diff --git a/.gitignore b/.gitignore
index 82d431f..cc705b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -275,3 +275,5 @@ Icon
 *tmp
 
 /.quarto/
+/Hetero-And-Macro/central-banks-hark-and-ssj_files
+Hetero-And-Macro/central-banks-hark-and-ssj.html
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/_extension.yml b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/_extension.yml
new file mode 100644
index 0000000..c66fde8
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/_extension.yml
@@ -0,0 +1,12 @@
+title: Metropolis
+author: Shafayet Khan Shafee
+version: 1.0.1
+quarto-required: ">=1.2.0"
+contributes:
+  formats:
+    revealjs:
+      theme: [serif, metropolis.scss]
+      filters:
+        - metropolis.lua
+
+
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/asset/jquery-3.6.3.min.js b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/asset/jquery-3.6.3.min.js
new file mode 100644
index 0000000..b5329e9
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/asset/jquery-3.6.3.min.js
@@ -0,0 +1,2 @@
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diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/metropolis.lua b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/metropolis.lua
new file mode 100644
index 0000000..710b3b7
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/metropolis.lua
@@ -0,0 +1,117 @@
+--[[
+MIT License
+
+Copyright (c) 2023 Shafayet Khan Shafee
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+]]--
+
+
+-- dependencies for code fullscreen
+local function ensure_codefullscreen_deps()
+  quarto.doc.add_html_dependency({
+    name = "jquery",
+    version = "3.6.3",
+    scripts = {
+      { path = "asset/jquery-3.6.3.min.js"}
+    }
+  })
+  quarto.doc.add_html_dependency({
+    name = "code-fullscreen",
+    version = "1.0.0",
+    scripts = {
+      { path = "resources/js/code-fullscreen.js", attribs = {defer = "true"} }
+    },
+    stylesheets = {"resources/css/code-fullscreen.css"}
+  })
+end
+
+-- dependencies for reveal-header
+local function ensure_reveal_header_deps()
+  quarto.doc.add_html_dependency({
+    name = "reveal-header",
+    version = "1.0.0",
+    scripts = {
+      { path = "resources/js/add_header.js", attribs = {defer = "true"}}
+    },
+    stylesheets = {"resources/css/add_header.css"}
+  })
+  end
+  
+  local function sc_sb_title()
+    quarto.doc.add_html_dependency({
+    name = "sc-sb-title",
+    version = "1.0.0",
+    scripts = {
+      { path = "resources/js/sc_sb_title.js", attribs = {defer = "true"}}
+    },
+    stylesheets = {"resources/css/sc_sb_title.css"}
+  })
+end
+
+
+if quarto.doc.is_format('revealjs') then
+  function Pandoc(doc)
+    local blocks = doc.blocks
+    local str = pandoc.utils.stringify
+    local meta = doc.meta
+    local reveal_header = meta['reveal-header']
+    code_fullscreen = (meta['code-fullscreen'] == nil and true) or false
+    
+    if code_fullscreen then 
+      -- Ensuring the code fullscreen dependencies
+      ensure_codefullscreen_deps()
+    end
+    
+    if reveal_header then
+      ensure_reveal_header_deps()
+      -- make divs structure for holding text and logo.
+      if reveal_header['sc-sb-title'] then
+        sc_sb_title()
+      end
+      local header_text = reveal_header['header-text'] and str(reveal_header['header-text']) or " "
+      local header_para_class = {class = "header-text"}
+      if reveal_header['title-as-header'] then
+        header_text = meta['title']
+        header_para_class = {class = "header-text title-text"}
+      end
+      if reveal_header['subtitle-as-header'] then
+        header_text = meta['subtitle']
+        header_para_class = {class = "header-text title-text"}
+      end
+      -- make divs structure for holding text and logo.
+      local header_logo = reveal_header['header-logo'] and str(reveal_header['header-logo']) or ""
+      local header_img = pandoc.Div(pandoc.Image("", header_logo, ""), {class = "header-logo"})
+      local header_section = pandoc.Div(pandoc.Para(" "), {class = "sc-title"})
+      local header_sbsection = pandoc.Div(pandoc.Para(" "), {class = "sb-title"})
+      local header_para = pandoc.Div(pandoc.Para(header_text), header_para_class)
+      local div = pandoc.Div(
+        {
+          header_img,
+          header_section,
+          header_para,
+          header_sbsection
+        }, 
+        {class = 'reveal-header'})
+      table.insert(blocks, div)
+      return doc
+    end
+    
+  end
+end
\ No newline at end of file
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/metropolis.scss b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/metropolis.scss
new file mode 100644
index 0000000..a8e83ee
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/metropolis.scss
@@ -0,0 +1,362 @@
+/**
+ * A simple theme for reveal.js presentations, derived from serif.css 
+ * It's in the spirit of the Metropolis theme for beamer https://github.com/matze/mtheme
+ *
+ * This theme is Copyright (C) 2016 Vince Hodges, http://sourdoughlabs.com - it is MIT licensed.
+ */
+
+
+/*-- scss:defaults --*/
+
+@import url('https://fonts.googleapis.com/css?family=Fira+Sans');
+
+/*-- scss:rules --*/
+
+.reveal a {
+    line-height: 1.3em; }
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+body {
+    background: #f1f1f1;
+    background-color: #f1f1f1; }
+
+body.dark {
+    background: #33474b;
+    background-color: #33474b; }
+    
+body.dark .reveal {
+    color:#f1f1f1;
+}
+
+body.dark .reveal h1,
+body.dark .reveal h2,
+body.dark .reveal h3,
+body.dark .reveal h4,
+body.dark .reveal h5,
+body.dark .reveal h6 {
+    color:#f1f1f1;
+}
+
+.reveal {
+    font-family: "Fira Sans";
+    font-size: 32px;
+    font-weight: normal;
+    color: #33474b; }
+
+::selection {
+    color: #fff;
+    background: #26351C;
+    text-shadow: none; }
+
+.reveal .slides {
+    text-align:left;
+}
+
+.reveal .slides > section,
+.reveal .slides > section > section {
+    line-height: 1.2;
+    font-weight: inherit; }
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+    margin: 0 0 20px 0;
+    color: #33474b;
+    font-family: "Fira Sans";
+    font-weight: normal;
+    line-height: 1;
+    letter-spacing: normal;
+    text-transform: none;
+    text-shadow: none;
+    word-wrap: break-word; }
+
+.reveal h1 {
+    font-size: 1.77em; }
+
+.reveal h2 {
+    font-size: 1.30em; }
+
+.reveal h3 {
+    font-size: .95em; }
+
+.reveal h4 {
+    font-size: .75em; }
+
+.reveal h1 {
+    text-shadow: none; }
+
+h1.subtitle {
+    font-size: 1em;
+    padding-bottom:15px;
+    border-bottom: 2px solid #EB811B;
+}
+
+h2.author, h3.date {
+    font-size: .6em;
+}
+
+h1.title {
+    font-variant: small-caps;
+}
+
+.level2 h1 {
+    font-size:1.57em;
+    font-variant: small-caps;
+    text-transform: lowercase;
+}
+
+.titleslide h1 {
+    font-variant: small-caps;
+    font-size:1.67em;
+    margin-left:25px;
+    margin-right:25px;
+    padding-bottom: 10px;
+    border-bottom: 2px solid #EB811B;
+}
+
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+    margin: 20px 0;
+    line-height: 1.3; }
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+    max-width: 95%;
+    max-height: 95%; }
+
+.reveal strong,
+.reveal b {
+    font-weight: bold; }
+
+.reveal em {
+    font-style: italic; }
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+    display: inline-block;
+    text-align: left;
+    margin: 0 0 0 1em; }
+
+.reveal ol {
+    list-style-type: decimal; }
+
+.reveal ul {
+    list-style-type: disc; }
+
+.reveal ul ul {
+    list-style-type: square; }
+
+.reveal ul ul ul {
+    list-style-type: circle; }
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+    display: block;
+    margin-left: 40px; }
+
+.reveal dt {
+    font-weight: bold; }
+
+.reveal dd {
+    margin-left: 40px; }
+
+.reveal q,
+.reveal blockquote {
+    quotes: none; }
+
+.reveal blockquote {
+    display: block;
+    position: relative;
+    width: 70%;
+    margin: 20px auto;
+    padding: 5px;
+    font-style: italic;
+    background: rgba(255, 255, 255, 0.05);
+    box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2); }
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+    display: inline-block; }
+
+.reveal q {
+    font-style: italic; }
+
+.reveal pre {
+    display: block;
+    position: relative;
+    width: 90%;
+    margin: 20px auto;
+    text-align: left;
+    font-size: 0.55em;
+    font-family: monospace;
+    line-height: 1.2em;
+    word-wrap: break-word;
+    box-shadow: 0px 0px 6px rgba(0, 0, 0, 0.3); }
+
+.reveal code {
+    font-family: monospace; }
+
+.reveal pre code {
+    display: block;
+    padding: 5px;
+    overflow: auto;
+    max-height: 400px;
+    word-wrap: normal; }
+
+.reveal table {
+    margin: auto;
+    border-collapse: collapse;
+    border-spacing: 0; }
+
+.reveal table th {
+    font-weight: bold; }
+
+.reveal table th,
+.reveal table td {
+    text-align: left;
+    padding: 0.2em 0.5em 0.2em 0.5em;
+    border-bottom: 1px solid; }
+
+.reveal table th[align="center"],
+.reveal table td[align="center"] {
+    text-align: center; }
+
+.reveal table th[align="right"],
+.reveal table td[align="right"] {
+    text-align: right; }
+
+.reveal table tr:last-child td {
+    border-bottom: none; }
+
+.reveal sup {
+    vertical-align: super; }
+
+.reveal sub {
+    vertical-align: sub; }
+
+.reveal small {
+    display: inline-block;
+    font-size: 0.6em;
+    line-height: 1.2em;
+    vertical-align: top; }
+
+.reveal small * {
+    vertical-align: top; }
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+    color: #51483D;
+    text-decoration: none;
+    -webkit-transition: color 0.15s ease;
+    -moz-transition: color 0.15s ease;
+    transition: color 0.15s ease; }
+
+.reveal a:hover {
+    color: #8b7c69;
+    text-shadow: none;
+    border: none; }
+
+.reveal .roll span:after {
+    color: #fff;
+    background: #25211c; }
+
+/*********************************************
+ * IMAGES
+ *********************************************/
+.reveal section img {
+    margin: 15px 0px;
+    background: rgba(255, 255, 255, 0.12);
+    border: 4px solid #000;
+    box-shadow: 0 0 10px rgba(0, 0, 0, 0.15); }
+
+.reveal section img.plain {
+    border: 0;
+    box-shadow: none; }
+
+.reveal a img {
+    -webkit-transition: all 0.15s linear;
+    -moz-transition: all 0.15s linear;
+    transition: all 0.15s linear; }
+
+.reveal a:hover img {
+    background: rgba(255, 255, 255, 0.2);
+    border-color: #51483D;
+    box-shadow: 0 0 20px rgba(0, 0, 0, 0.55); }
+
+
+/*********************************************
+ * Slides with background-image
+ *********************************************/
+
+section[data-background-image] {
+  color: white;
+  
+  h1, h2, h3, h4, h5, h5 {
+    color: white;
+  }
+  
+  code {
+    filter: brightness(2);
+  }
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls .navigate-left,
+.reveal .controls .navigate-left.enabled {
+    border-right-color: #51483D; }
+
+.reveal .controls .navigate-right,
+.reveal .controls .navigate-right.enabled {
+    border-left-color: #51483D; }
+
+.reveal .controls .navigate-up,
+.reveal .controls .navigate-up.enabled {
+    border-bottom-color: #51483D; }
+
+.reveal .controls .navigate-down,
+.reveal .controls .navigate-down.enabled {
+    border-top-color: #51483D; }
+
+.reveal .controls .navigate-left.enabled:hover {
+    border-right-color: #8b7c69; }
+
+.reveal .controls .navigate-right.enabled:hover {
+    border-left-color: #8b7c69; }
+
+.reveal .controls .navigate-up.enabled:hover {
+    border-bottom-color: #8b7c69; }
+
+.reveal .controls .navigate-down.enabled:hover {
+    border-top-color: #8b7c69; }
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+    background: rgba(235, 129, 27, .4); }
+
+.reveal .progress span {
+    background: rgba(235, 129, 27, 1);
+    -webkit-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+    -moz-transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985);
+    transition: width 800ms cubic-bezier(0.26, 0.86, 0.44, 0.985); }
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/add_header.css b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/add_header.css
new file mode 100644
index 0000000..87b8729
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/add_header.css
@@ -0,0 +1,108 @@
+/* 
+Copyright (c) 2023 Shafayet Khan Shafee 
+MIT LICENSED 
+*/
+
+@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz@8..60&display=swap');
+@import url('https://fonts.googleapis.com/css?family=Fira+Sans');
+
+:root {
+  --header-font-size: max(10px, 1.2vw);
+  --header-font-color: #898E8B;
+  --header-margin: 0px 0px 0px 0px;
+  --header-font-family: 'Fira Sans', sans-serif;
+}
+
+.reveal .reveal-header {
+  top: 0;
+  margin: 3.2px 0px 2px 0px;
+  width: 100%;
+  position: fixed;
+  z-index: 5;
+  font-family: var(--header-font-family);
+}
+
+.reveal .reveal-header p {
+  color: var(--header-font-color);
+  text-align: center;
+  margin: var(--header-margin);
+  font-size: var(--header-font-size);
+}
+
+.reveal-header .sc-title p,
+.reveal-header .sb-title p {
+  font-size: max(10px, 1.25vw);
+  filter: brightness(0.85);
+}
+
+.reveal-header .sc-title p { float: left; margin-left: 2vw}
+.reveal-header .sb-title p { float: right;}
+.reveal-header.no-logo .sc-title p {margin-left: 6vw}
+
+div.header-logo { grid-area: logo;}
+div.sc-title { grid-area: sc;}
+div.sb-title { grid-area: sb;}
+div.header-text { grid-area: ht;}
+div.reveal.has-logo div.slide-number {
+  grid-area: sn;
+  top: unset !important;
+  right: unset !important;
+  bottom: unset !important;
+  padding: 5px 5px 5px 5px;
+  justify-self: center;
+  font-family: var(--header-font-family);
+  font-size: 18px;
+}
+
+div.reveal-header {
+  display: grid;
+  grid-template-columns: 0.4fr 0.4fr 2fr 0.4fr 0.3fr;
+  grid-template-areas: "logo sc ht sb sn";
+  column-gap: 10px;
+  align-items: center;
+}
+
+div.reveal-header.no-logo {
+  grid-template-columns: 0.7fr 2fr 0.7fr 0.05fr;
+  grid-template-areas: "sc ht sb sn";
+  margin-top: 1.5vh;
+}
+
+.reveal .header-logo img {
+  margin: var(--header-margin);
+  padding-left: 1vw;
+  padding-top: 5px;
+  height: 100%;
+  width: auto;
+  max-width: max(60px, 10vw);
+  max-height: max(60px, 10vh);
+}
+
+
+/* .reveal .slides section:not(.title-slide) { margin-top: 3vh !important;} */
+.inverse-header { color: #c5d7ce !important;}
+
+div.slides section:not(.title-slide) {
+  padding-top: 1em;
+}
+
+/* On screens that are 600px or less*/
+@media screen and (max-width: 600px) {
+  .reveal .header-logo img {
+    padding-top: 0px;
+    margin: 0px 0px 5px 0px;
+  }
+  
+  div.reveal-header {
+    grid-template-columns: 0.4fr 0.4fr 1fr 0.4fr 0.3fr;
+    grid-template-areas: "logo sc ht sb sn";
+  }
+
+  div.reveal-header.no-logo {
+    grid-template-columns: 0.7fr 1fr 0.7fr 0.05fr;
+    grid-template-areas: "sc ht sb sn";
+  }
+  
+  .reveal-header .sc-title p { margin-left: 1vw}
+  div.reveal.has-logo div.slide-number { font-size: 10px; }
+}
\ No newline at end of file
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/code-fullscreen.css b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/code-fullscreen.css
new file mode 100644
index 0000000..b32f43c
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/code-fullscreen.css
@@ -0,0 +1,154 @@
+/**
+ * code-fullscreen
+ * A filter that add a fullscreen button in code chunk.
+ * 
+ * MIT License
+ * Copyright (c) 2023 Shafayet Khan Shafee.
+ */
+
+
+/**************************** fullscreen buttons *************************/ 
+
+:root {
+  --fullscreen-bg-color: var(--quarto-body-bg);
+}
+
+
+pre .fullscreen-button {
+  z-index: 5;
+  position: absolute;
+  top: 0;
+  right: 30px;
+  border: 0;
+  margin-top: 7px;
+  margin-right: 5px;
+  background-color: transparent;
+  display: none;
+  cursor: pointer;
+}
+
+div#fullscreen-box pre .fullscreen-button {
+  position: fixed;
+  right: 0;
+}
+
+.reveal-full-page pre .fullscreen-button {
+  margin-top: 5px;
+}
+
+.reveal-full-page div#fullscreen-box pre .fullscreen-button {
+  position: fixed;
+  margin-top: 7px;
+  right: 15px;
+}
+
+
+pre:hover .fullscreen-button {
+  display: block;
+}
+
+/*
+div.sourceCode.cell-code:hover .fullscreen-button {
+  display: block;
+}
+*/
+
+div#fullscreen-box:hover .fullscreen-button {
+  display: block;
+}
+
+
+pre .fullscreen-button .fullscreen-icon {
+  content: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%23868686" class="bi bi-fullscreen" viewBox="0 0 16 16"><path d="M1.5 1a.5.5 0 0 0-.5.5v4a.5.5 0 0 1-1 0v-4A1.5 1.5 0 0 1 1.5 0h4a.5.5 0 0 1 0 1h-4zM10 .5a.5.5 0 0 1 .5-.5h4A1.5 1.5 0 0 1 16 1.5v4a.5.5 0 0 1-1 0v-4a.5.5 0 0 0-.5-.5h-4a.5.5 0 0 1-.5-.5zM.5 10a.5.5 0 0 1 .5.5v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 1 0 1h-4A1.5 1.5 0 0 1 0 14.5v-4a.5.5 0 0 1 .5-.5zm15 0a.5.5 0 0 1 .5.5v4a1.5 1.5 0 0 1-1.5 1.5h-4a.5.5 0 0 1 0-1h4a.5.5 0 0 0 .5-.5v-4a.5.5 0 0 1 .5-.5z"/></svg>');
+}
+
+div#fullscreen-box pre .fullscreen-button .fullscreen-exit-icon {
+  content: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-fullscreen-exit" viewBox="0 0 16 16"><path d="M5.5 0a.5.5 0 0 1 .5.5v4A1.5 1.5 0 0 1 4.5 6h-4a.5.5 0 0 1 0-1h4a.5.5 0 0 0 .5-.5v-4a.5.5 0 0 1 .5-.5zm5 0a.5.5 0 0 1 .5.5v4a.5.5 0 0 0 .5.5h4a.5.5 0 0 1 0 1h-4A1.5 1.5 0 0 1 10 4.5v-4a.5.5 0 0 1 .5-.5zM0 10.5a.5.5 0 0 1 .5-.5h4A1.5 1.5 0 0 1 6 11.5v4a.5.5 0 0 1-1 0v-4a.5.5 0 0 0-.5-.5h-4a.5.5 0 0 1-.5-.5zm10 1a1.5 1.5 0 0 1 1.5-1.5h4a.5.5 0 0 1 0 1h-4a.5.5 0 0 0-.5.5v4a.5.5 0 0 1-1 0v-4z"/></svg>');
+}
+
+/**************************** fullscreen buttons *************************/ 
+
+
+
+/*************************** div#fullscreen-box **************************/
+
+div#fullscreen-box {
+  margin: 0;
+  padding: 0;
+  z-index: 9999;
+  position: absolute;
+  top: 0;
+  right: 0;
+  width: 100vw;
+  height: 100svmax;
+  display: none;
+  background-color: var(--fullscreen-bg-color);
+}
+
+div#fullscreen-box.visible{
+    display: block;
+}
+
+div#fullscreen-box pre.sourceCode {
+  background-color: var(--fullscreen-bg-color);
+}
+
+div#fullscreen-box code {
+  padding-top: 0.3rem ;
+  padding-bottom: 1.5rem;
+}
+
+
+div#fullscreen-box pre code span a {
+  pointer-events: none;
+}
+
+div#fullscreen-box code {
+  font-family: var(--r-code-font);
+}
+
+div#fullscreen-box pre.numberSource code > span > a:first-child::before {
+    left: -1.2em !important;
+}
+
+div#fullscreen-box pre.numberSource {
+  border-left: 1px solid #aaaaaa !important;
+  border-radius: 0;
+  margin-left: 4em;
+}
+
+body.reveal-viewport:has(div#fullscreen-box) {
+  overflow: overlay;
+}
+
+.reveal-full-page div#fullscreen-box {
+  height: unset !important;
+}
+
+.reveal-full-page div#fullscreen-box pre.numberSource {
+  border-left: 1px solid #aaaaaa !important;
+  border-radius: 0;
+  margin-left: 3em;
+}
+
+
+/********************** for mobile devices ****************************/
+
+@media only screen and (max-width: 992px) {
+  div#fullscreen-box {
+    font-size: 1.5vw;
+  }
+}
+
+@media only screen and (max-width: 500px) {
+  div#fullscreen-box pre.numberSource code > span {
+    left: -5em !important;
+  }
+}
+
+@media only screen and (min-width: 501px) and (max-width: 768px) {
+  div#fullscreen-box pre.numberSource code > span {
+    left: -4.5em !important;
+  }
+
+}
\ No newline at end of file
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/sc_sb_title.css b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/css/sc_sb_title.css
new file mode 100644
index 0000000..e69de29
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/add_header.js b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/add_header.js
new file mode 100644
index 0000000..9020f20
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/add_header.js
@@ -0,0 +1,119 @@
+/**
+ * reveal-header
+ * A filter that adds header text and logo.
+ * 
+ * MIT License
+ * Copyright (c) 2023 Shafayet Khan Shafee.
+ */
+
+function header() {
+  
+  // add the header structure as the firstChild of div.reveal-header
+  function add_header() {
+    let header = document.querySelector("div.reveal-header");
+    let reveal = document.querySelector(".reveal");
+    reveal.insertBefore(header, reveal.firstChild);
+    
+    logo_img = document.querySelector('.header-logo img');
+    if (logo_img.getAttribute('src') == null) {
+      if (logo_img?.getAttribute('data-src') != null) {
+        logo_img.src = logo_img?.getAttribute('data-src') || "";
+        logo_img.removeAttribute('data-src'); 
+      };
+    };
+  };
+    
+  // add the class inverse-header for slide with has-dark-background class
+  // otherwise remove it.
+  function add_class(has_dark, header_paras) {
+    header_paras.forEach(el => {
+      el.classList.remove('inverse-header');
+      if(has_dark) {
+        el.classList.add('inverse-header');
+      };
+    });
+  };
+  
+  /* 
+  function toggle_header_text(event, text) {
+    
+  }
+  */
+  
+  // dynamically changing the header
+  function change_header(dheader, cheader, ctext) {
+    // dhead => dynamic header
+    // chead => constant header
+    // ctext => contstant header_text inner html
+    if (dheader !== null) {
+      cheader.innerHTML = dheader.innerHTML;  
+    } else {
+      cheader.innerHTML = ctext;
+    };
+  };
+  
+  
+  if (Reveal.isReady()) {
+    
+    add_header();
+    
+    if (document.querySelector('div.reveal.has-logo') != null) {
+      var slide_number = document.querySelector('div.slide-number');
+      var header = document.querySelector("div.reveal-header");
+      header.appendChild(slide_number);
+    };
+  
+    // Get the default header text element and innner HTML (i.e. literal text)
+    var header_text = document.querySelector("div.header-text p");
+    const header_inner_html = header_text.innerHTML;
+    
+    var header_paras = document.querySelectorAll("div.reveal-header p");
+    var dark = Reveal.getCurrentSlide().classList.contains('has-dark-background');
+    add_class(dark, header_paras);
+    
+    Reveal.on( 'slidechanged', event => {
+      var has_dark = event.currentSlide.classList.contains('has-dark-background');
+      add_class(has_dark, header_paras);
+    });
+    
+    /**** for slide specific header (i.e. text in ::: header) *******************/
+    
+    // make the visibility of slide specific header text defined in slide body none
+    document.querySelectorAll('div.header').forEach(el => {
+      el.style.display = 'none';
+    });
+    
+    // change the header if currently loaded slide has the header div defined
+    // which won't be captured by slidechanged event unless we change slides.
+    let dynamic_header = Reveal.getCurrentSlide().querySelector('div.header p');
+    change_header(dynamic_header, header_text, header_inner_html);
+    
+    Reveal.on( 'slidechanged', event => {
+      let dyn_header = event.currentSlide.querySelector('div.header p');
+      change_header(dyn_header, header_text, header_inner_html);
+    });
+    /****************************************************************************/
+    
+    // header text in title slide if title or subtitle is used as header text
+    var title_text = document.querySelector('.reveal-header .title-text p');
+    
+    if (title_text != null) {
+      
+      title_text.style.display = 'none';
+      
+      Reveal.on( 'slidechanged' , event => {
+        if (event.currentSlide.matches('#title-slide')) {
+          title_text.style.display = 'none';
+        } else {
+          title_text.style.display = 'block';
+        }
+      });  
+    };
+    
+  }; 
+};
+
+
+window.addEventListener("load", (event) => {
+  header();
+});
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/code-fullscreen.js b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/code-fullscreen.js
new file mode 100644
index 0000000..054191f
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/code-fullscreen.js
@@ -0,0 +1,61 @@
+/* 
+code modified from https://github.com/mkordulewski/reveal.js-fullscreen-code/blob/master/reveal.js-fullscreen-code.js
+*/
+
+/**
+ * code-fullscreen
+ * A filter that add a fullscreen button in code chunk.
+ * 
+ * MIT License
+ * Copyright (c) 2023 Shafayet Khan Shafee.
+ */
+
+function fullscreen_code() {
+  // creating the fullscreen box
+  $('body').append("<div id='fullscreen-box'><pre class='sourceCode numberSource number-lines'><code class='sourceCode'></code></pre></div>" );
+  
+  // for revealjs do not link the button
+  if ($('div.reveal').length) {
+    $('pre code').before("<button title='Fullscreen' class='fullscreen-button'><i class='fullscreen-icon'></i></button>");
+    $('div#fullscreen-box button.fullscreen-button').replaceWith("<button title='Exit Fullscreen' class='fullscreen-button'><i class='fullscreen-exit-icon'></i></button>")
+  } else {
+    // create buttons with links
+    $('pre code').before("<button title='Fullscreen' class='fullscreen-button'><a href='#fullscreen-box'><i class='fullscreen-icon'></a></i></button>");
+    $('div#fullscreen-box button.fullscreen-button').replaceWith("<button title='Exit Fullscreen' class='fullscreen-button'><a href='#'><i class='fullscreen-exit-icon'></i></a></button>")
+  }
+  
+  var fullscreenBoxVisible = false;
+  $('button.fullscreen-button').click(function(e){
+      var code = this.parentElement.children[1].innerHTML;
+      if (fullscreenBoxVisible) {
+          $('div#fullscreen-box pre code').html('');
+          $('div#fullscreen-box').toggleClass('visible');
+          fullscreenBoxVisible = false;
+      } else {
+          $('div#fullscreen-box pre code').html(code);
+          $('div#fullscreen-box').toggleClass('visible');
+          fullscreenBoxVisible = true;
+          var box_height = Math.max($('div#fullscreen-box pre').outerHeight(), $(document).height());
+          $('div#fullscreen-box pre').height(box_height);
+          $('div#fullscreen-box').height(box_height);
+          // attach links for html (not revealjs)
+          if (!$('div.reveal').length) {
+            let id = this.parentElement.parentElement.id;
+            let id_string = `#${id}`;
+            $('div#fullscreen-box button.fullscreen-button a').attr("href", id_string); 
+          };
+      };
+    // slow the link changing
+    if (!$('div.reveal').length) {
+       setTimeout(function() {
+         if (!fullscreenBoxVisible) {
+           $('div#fullscreen-box button.fullscreen-button a').attr("href", "#fullscreen-box");
+         }
+       }, 100);
+    };
+  });
+};
+
+window.addEventListener("load", (event) => {
+  fullscreen_code();
+});
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/sc_sb_title.js b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/sc_sb_title.js
new file mode 100644
index 0000000..3c621e5
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/metropolis/resources/js/sc_sb_title.js
@@ -0,0 +1,90 @@
+/**
+ * reveal-header
+ * A filter that adds header text and logo.
+ * 
+ * MIT License
+ * Copyright (c) 2023 Shafayet Khan Shafee.
+ */
+ 
+ function add_sc_sb_title() {
+   
+   function get_title() {
+    var h1_arr = [];
+    var h2_arr = [];
+  
+    Reveal.getSlides().forEach(el => {
+      if (!el.matches('#title-slide')) {
+       var h1 = el.querySelector('.title-slide h1')?.innerText;
+       var h2 = el.querySelector('.title-slide h2')?.innerText;
+       h1_arr.push(h1);
+       h2_arr.push(h2);
+      };
+    });
+    
+    return [h1_arr, h2_arr]
+  };
+    
+  function fill_array(ar) {
+    let last_val = ar[0] || " ";
+    for (let i = 1; i < ar.length; i++) {
+      if (typeof ar[i] === 'undefined') {
+        ar[i] = last_val;
+      } else {
+        last_val = ar[i];
+      }
+    }
+    return ar
+  };
+  
+  
+  if (Reveal.isReady()) {
+  
+    if (document.querySelector('div.reveal-header img').getAttribute('src').length == 0) {
+      document.querySelector('div.reveal-header').classList.add('no-logo')
+    }
+  
+    var [h1_array, h2_array] = get_title();
+    var filled_h1_array = fill_array(h1_array);
+    var filled_h2_array = fill_array(h2_array);
+    
+    Reveal.getSlides().forEach((el, idx) => {
+      if (!el.matches('#title-slide')) {
+        el.setAttribute('data-sc-title', filled_h1_array[(idx - 1)])
+        el.setAttribute('data-sb-title', filled_h2_array[(idx - 1)])
+      }
+    });
+  
+    Reveal.on( 'slidechanged', event => {
+      let sp = Reveal.getSlidesElement().querySelector('.stack.present');
+      
+      if (sp != null) {
+        let header = document.querySelector("div.reveal-header");
+        
+        // handling h1 section title (`.sc-title`)
+        var section_text = event.currentSlide.getAttribute('data-sc-title') || " ";
+        if (event.currentSlide.matches('.title-slide.level1')) {
+          header.querySelector('.sc-title p').innerText = ""; 
+        } else if (event.currentSlide.matches('.title-slide.level2')) {
+          header.querySelector('.sc-title p').innerText = section_text;  
+        } else {
+          header.querySelector('.sc-title p').innerText = section_text;
+        };
+        
+        // handling h2 section title (`.sb-title`)
+        var sbsection_text = event.currentSlide.getAttribute('data-sb-title') || " ";
+        if (event.currentSlide.matches('.title-slide.level1')) {
+          header.querySelector('.sb-title p').innerText = "";
+        } else if (event.currentSlide.matches('.title-slide.level2')) {
+          header.querySelector('.sb-title p').innerText = "";
+        } else {
+          header.querySelector('.sb-title p').innerText = sbsection_text;
+        };
+      };
+    });
+  };
+};
+
+
+window.addEventListener("load", (event) => {
+  add_sc_sb_title();
+});
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/_extension.yml b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/_extension.yml
new file mode 100644
index 0000000..b28c980
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/_extension.yml
@@ -0,0 +1,8 @@
+title: Reveal-header
+author: Shafayet Khan Shafee
+version: 1.2.8
+quarto-required: ">=1.2.0"
+contributes:
+  filters:
+    - reveal-header.lua
+
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/add_header.css b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/add_header.css
new file mode 100644
index 0000000..db2c82c
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/add_header.css
@@ -0,0 +1,70 @@
+/*@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz@8..60&display=swap');*/
+
+
+:root {
+  --header-font-size: max(10px, 1.4vw);
+  --header-font-color: #898E8B;
+  --header-margin: 0px 0px 0px 0px;
+  /*--header-font-family: 'Source Serif 4', serif;*/
+}
+
+.reveal .reveal-header {
+  top: 0;
+  margin: 3.2px 0px 2px 0px;
+  width: 100%;
+  position: fixed;
+  z-index: 5;
+  /*font-family: var(--header-font-family);*/
+}
+
+.reveal .reveal-header p {
+  color: var(--header-font-color);
+  text-align: center;
+  margin: var(--header-margin);
+  font-size: var(--header-font-size);
+}
+
+.reveal-header .sc-title p,
+.reveal-header .sb-title p {
+  font-size: max(10px, 1.45vw);
+  filter: brightness(0.85);
+}
+
+.reveal-header .sc-title p { float: left; margin-left: 0.5vw}
+.reveal-header .sb-title p { float: right; margin-right: 0.5vw}
+.reveal-header.no-logo .sc-title p {margin-left: 6vw}
+
+
+.reveal .header-logo svg,
+.reveal .header-logo img {
+  margin: var(--header-margin);
+  padding-left: 1vw;
+  padding-top: 5px;
+  height: 100%;
+  width: auto;
+  max-width: max(60px, 10vw);
+  max-height: max(60px, 10vh);
+}
+
+
+
+
+/* .reveal .slides { margin-top: 3vh !important;} */
+.inverse-header { color: #c5d7ce !important;}
+
+
+div.slides section:not(.title-slide):not(#title-slide):not(.stack) {
+  padding-top: 1em;
+}
+
+/* On screens that are 600px or less*/
+@media screen and (max-width: 600px) {
+  .reveal .header-logo img {
+    padding-top: 0px;
+    margin: 0px 0px 5px 0px;
+  }
+
+  .reveal-header .sc-title p { margin-left: 1vw; }
+  .reveal-header.no-logo .sc-title p {margin-left: 2vw; }
+  div.reveal.has-logo div.slide-number { font-size: 10px; }
+}
\ No newline at end of file
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/grid_htext.css b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/grid_htext.css
new file mode 100644
index 0000000..7fdc08f
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/grid_htext.css
@@ -0,0 +1,50 @@
+div.header-logo { grid-area: logo;}
+
+.no-logo div.header-logo { grid-area: unset !important; }
+
+div.sc-title { grid-area: sc;}
+div.sb-title { grid-area: sb;}
+div.header-text { grid-area: ht;}
+div.reveal.has-logo div.slide-number {
+  grid-area: sn;
+  top: unset !important;
+  right: unset !important;
+  bottom: unset !important;
+  padding: 5px 5px 5px 5px;
+  justify-self: center;
+  /*font-family: var(--header-font-family);*/
+  font-size: 18px;
+}
+
+div.reveal-header {
+  display: grid;
+  grid-template-columns: 0.4fr 0.4fr 2fr 0.4fr 0.3fr;
+  grid-template-areas: "logo sc ht sb sn";
+  column-gap: 10px;
+  align-items: center;
+}
+
+div.reveal-header.no-logo {
+  grid-template-columns: 0.7fr 2fr 0.7fr 0.05fr;
+  grid-template-areas: "sc ht sb sn";
+  margin-top: 1.5vh;
+}
+
+
+/* On screens that are 600px or less*/
+@media screen and (max-width: 600px) {
+
+  div.reveal-header {
+    grid-template-columns: 0.4fr 0.4fr 1fr 0.4fr 0.3fr;
+    grid-template-areas: "logo sc ht sb sn";
+  }
+
+  div.reveal-header.no-logo {
+    grid-template-columns: 0.7fr 1fr 0.7fr 0.05fr;
+    grid-template-areas: "sc ht sb sn";
+  }
+  
+  .reveal-header .sc-title p { margin-left: 1vw; }
+  .reveal-header.no-logo .sc-title p {margin-left: 2vw; }
+  div.reveal.has-logo div.slide-number { font-size: 10px; }
+}
\ No newline at end of file
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/grid_no_htext.css b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/grid_no_htext.css
new file mode 100644
index 0000000..5b62397
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/css/grid_no_htext.css
@@ -0,0 +1,50 @@
+div.header-logo { grid-area: logo;}
+
+.no-logo div.header-logo { grid-area: unset !important; }
+
+div.sc-title { grid-area: sc;}
+div.header-text { grid-area: ht;}
+div.sb-title { grid-area: sb;}
+div.reveal.has-logo div.slide-number {
+  grid-area: sn;
+  top: unset !important;
+  right: unset !important;
+  bottom: unset !important;
+  padding: 5px 5px 5px 5px;
+  justify-self: center;
+  /*font-family: var(--header-font-family);*/
+  font-size: 18px;
+}
+
+div.reveal-header {
+  display: grid;
+  grid-template-columns: 0.35fr 1.2fr 0.1fr 1.2fr 0.2fr;
+  grid-template-areas: "logo sc ht sb sn";
+  column-gap: 10px;
+  align-items: center;
+}
+
+div.reveal-header.no-logo {
+  grid-template-columns: 1fr 0.1fr 1fr 0.15fr;
+  grid-template-areas: "sc ht sb sn";
+  margin-top: 1.5vh;
+}
+
+
+/* On screens that are 600px or less*/
+@media screen and (max-width: 600px) {
+
+  div.reveal-header {
+    grid-template-columns:  0.2fr 1.2fr 0.1fr 1.2fr 0.4fr;
+    grid-template-areas: "logo sc ht sb sn";
+  }
+
+  div.reveal-header.no-logo {
+    grid-template-columns: 1fr 0.1fr 1fr 0.25fr;
+    grid-template-areas: "sc ht sb sn";
+  }
+  
+  .reveal-header .sc-title p { margin-left: 1vw; }
+  .reveal-header.no-logo .sc-title p {margin-left: 2vw; }
+  div.reveal.has-logo div.slide-number { font-size: 10px; }
+}
\ No newline at end of file
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/js/add_header.js b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/js/add_header.js
new file mode 100644
index 0000000..daebbc1
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/js/add_header.js
@@ -0,0 +1,166 @@
+/**
+ * reveal-header
+ * A filter that adds header text and logo.
+ * 
+ * MIT License
+ * Copyright (c) 2023-2024 Shafayet Khan Shafee.
+ */
+
+function header() {
+  
+  // add the header structure as the firstChild of div.reveal-header
+  function add_header() {
+    let header = document.querySelector("div.reveal-header");
+    let reveal = document.querySelector(".reveal");
+    reveal.insertBefore(header, reveal.firstChild);
+    
+    logo_img = document.querySelector('.header-logo img');
+    if (logo_img?.getAttribute('src') == null) {
+      if (logo_img?.getAttribute('data-src') != null) {
+        logo_img.src = logo_img?.getAttribute('data-src') || "";
+        logo_img?.removeAttribute('data-src'); 
+      };
+    };
+  };
+  
+  function linkify_logo(logo, href) {
+    const logo_cloned = logo.cloneNode(true);
+    const link = document.createElement('a');
+    link.href = href;
+    link.target = '_blank';
+    link.appendChild(logo_cloned);
+    logo.replaceWith(link);
+  };
+    
+  // add the class inverse-header for slide with has-dark-background class
+  // otherwise remove it.
+  function add_class(has_dark, header_paras) {
+    header_paras.forEach(el => {
+      el.classList.remove('inverse-header');
+      if(has_dark) {
+        el.classList.add('inverse-header');
+      };
+    });
+  };
+  
+  
+  // dynamically changing the header
+  function change_header(dheader, cheader, ctext) {
+    // dhead => dynamic header
+    // chead => constant header
+    // ctext => contstant header_text inner html
+    if (dheader !== null) {
+      cheader.innerHTML = dheader.innerHTML;  
+    } else {
+      cheader.innerHTML = ctext;
+    };
+  };
+  
+  function hide_from_title_slide(element) {
+      Reveal.on( 'slidechanged' , event => {
+        if (event.currentSlide.matches('#title-slide')) {
+          element.style.visibility = 'hidden';
+        } else {
+          element.style.visibility = 'visible';
+        }
+      });
+  };
+  
+  function get_clean_attrs(elem, attrName) {
+    let attrVal = elem.getAttribute(attrName);
+    if (attrVal != null) {
+     elem.removeAttribute(attrName); 
+    }
+    return attrVal;
+  };
+  
+  
+  if (Reveal.isReady()) {
+    
+    add_header();
+    
+    /*************** linkifying the header and footer logo ********************/
+    const header_logo = document.querySelector('div.header-logo');
+    if (header_logo != null) {
+      const header_logo_link = get_clean_attrs(header_logo, 'data-header-logo-link');
+      const footer_logo_link = get_clean_attrs(header_logo, 'data-footer-logo-link');
+      
+      if (header_logo_link != null) {
+        const header_logo_img = document.querySelector('div.header-logo').firstElementChild;
+        linkify_logo(header_logo_img, header_logo_link);
+      };
+      
+      if (footer_logo_link != null) {
+        const footer_logo_img = document.querySelector('.slide-logo');
+        footer_logo_img.setAttribute('style', "z-index:99;");
+        linkify_logo(footer_logo_img, footer_logo_link);
+      };
+    };
+    /****************************** END ***************************************/
+    
+    if (document.querySelector('div.reveal.has-logo') != null) {
+      var slide_number = document.querySelector('div.slide-number');
+      var header = document.querySelector("div.reveal-header");
+      header.appendChild(slide_number);
+    };
+  
+    // Get the default header text element and innner HTML (i.e. literal text)
+    var header_text = document.querySelector("div.header-text p");
+    const header_inner_html = header_text.innerHTML;
+    
+    var header_paras = document.querySelectorAll("div.reveal-header p");
+    var dark = Reveal.getCurrentSlide().classList.contains('has-dark-background');
+    add_class(dark, header_paras);
+    
+    Reveal.on( 'slidechanged', event => {
+      var has_dark = event.currentSlide.classList.contains('has-dark-background');
+      add_class(has_dark, header_paras);
+    });
+    
+    // make the visibility of slide specific header text defined in slide body none
+    document.querySelectorAll('div.header').forEach(el => {
+      el.style.display = 'none';
+    });
+    
+    
+    // change the header if currently loaded slide has the header div defined
+    // which won't be captured by slidechanged event unless we change slides.
+    let dynamic_header = Reveal.getCurrentSlide().querySelector('div.header p');
+    change_header(dynamic_header, header_text, header_inner_html);
+    
+    Reveal.on( 'slidechanged', event => {
+      let dyn_header = event.currentSlide.querySelector('div.header p');
+      change_header(dyn_header, header_text, header_inner_html);
+    });
+    
+    /************** header text in title slide if title or ***********************/
+    /*************  subtitle is used as header text        ***********************/
+    
+    var title_text = document.querySelector('.reveal-header .title-text p');
+    if (title_text != null) {
+      title_text.style.visibility = 'hidden';
+      hide_from_title_slide(title_text);
+    };
+    
+    /*************** hide header text and logo on title slide ********************/
+    
+    var hide_header_text = document.querySelector('.header-text').getAttribute('data-hide-from-titleslide');
+    var hide_header_logo = document.querySelector('.header-logo').getAttribute('data-hide-from-titleslide');
+    
+    if (hide_header_text == 'true') {
+      header_text.style.visibility = 'hidden';
+      hide_from_title_slide(header_text);
+    }
+    
+    if (hide_header_logo == 'true') {
+      logo_img.style.visibility = 'hidden';
+      hide_from_title_slide(logo_img);
+    } 
+    
+  }; 
+};
+
+
+window.addEventListener("load", (event) => {
+  header();
+});
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/js/sc_sb_title.js b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/js/sc_sb_title.js
new file mode 100644
index 0000000..c85fc6c
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/resources/js/sc_sb_title.js
@@ -0,0 +1,93 @@
+/**
+ * reveal-header
+ * A filter that adds header text and logo.
+ * 
+ * MIT License
+ * Copyright (c) 2023-2024 Shafayet Khan Shafee.
+ */
+ 
+ function add_sc_sb_title() {
+   
+   function get_title() {
+    var h1_arr = [];
+    var h2_arr = [];
+  
+    Reveal.getSlides().forEach(el => {
+      if (!el.matches('#title-slide')) {
+       var h1 = el.querySelector('.title-slide h1')?.innerText;
+       var h2 = el.querySelector('.title-slide h2')?.innerText;
+       h1_arr.push(h1);
+       h2_arr.push(h2);
+      };
+    });
+    
+    return [h1_arr, h2_arr]
+  };
+    
+  function fill_array(ar) {
+    let last_val = ar[0] || " ";
+    for (let i = 1; i < ar.length; i++) {
+      if (typeof ar[i] === 'undefined') {
+        ar[i] = last_val;
+      } else {
+        last_val = ar[i];
+      }
+    }
+    return ar
+  };
+  
+  
+  if (Reveal.isReady()) {
+  
+    if (document.querySelector('div.reveal-header img')?.getAttribute('src')?.length == 0) {
+      document.querySelector('div.reveal-header').classList.add('no-logo')
+    }
+  
+    var [h1_array, h2_array] = get_title();
+    var filled_h1_array = fill_array(h1_array);
+    var filled_h2_array = fill_array(h2_array);
+    
+    Reveal.getSlides().forEach((el, idx) => {
+      if (!el.matches('#title-slide')) {
+        el.setAttribute('data-sc-title', filled_h1_array[(idx - 1)])
+        el.setAttribute('data-sb-title', filled_h2_array[(idx - 1)])
+      }
+    });
+  
+    Reveal.on( 'slidechanged', event => {
+      let sp = Reveal.getSlidesElement().querySelector('.stack.present');
+      
+      if (sp != null) {
+        let header = document.querySelector("div.reveal-header");
+        
+        // handling h1 section title (`.sc-title`)
+        var section_text = event.currentSlide.getAttribute('data-sc-title') || " ";
+        if (event.currentSlide.matches('.title-slide.level1')) {
+          header.querySelector('.sc-title p').innerText = ""; 
+        } else if (event.currentSlide.matches('.title-slide.level2')) {
+          header.querySelector('.sc-title p').innerText = section_text;  
+        } else {
+          header.querySelector('.sc-title p').innerText = section_text;
+        };
+        
+        // handling h2 section title (`.sb-title`)
+        var sbsection_text = event.currentSlide.getAttribute('data-sb-title') || " ";
+        if (event.currentSlide.matches('.title-slide.level1')) {
+          header.querySelector('.sb-title p').innerText = "";
+        } else if (event.currentSlide.matches('.title-slide.level2')) {
+          header.querySelector('.sb-title p').innerText = "";
+        } else {
+          header.querySelector('.sb-title p').innerText = sbsection_text;
+        };
+      };
+    });
+  };
+};
+
+
+window.addEventListener("load", (event) => {
+  add_sc_sb_title();
+});
+
+
+
diff --git a/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/reveal-header.lua b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/reveal-header.lua
new file mode 100644
index 0000000..33b3dc6
--- /dev/null
+++ b/Hetero-And-Macro/_extensions/shafayetShafee/reveal-header/reveal-header.lua
@@ -0,0 +1,128 @@
+--[[
+MIT License
+
+Copyright (c) 2023 Shafayet Khan Shafee
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+]]--
+
+
+local function ensureHtmlDeps()
+  quarto.doc.add_html_dependency({
+    name = "reveal-header",
+    version = "1.0.0",
+    scripts = {
+        { path = "resources/js/add_header.js", attribs = {defer = "true"}}
+      },
+    stylesheets = {"resources/css/add_header.css"}
+  })
+end
+
+local function sc_sb_title()
+  quarto.doc.add_html_dependency({
+    name = "sc-sb-title",
+    version = "1.0.0",
+    scripts = {
+        { path = "resources/js/sc_sb_title.js", attribs = {defer = "true"}}
+      }
+  })
+end
+
+local function grid_htext()
+  quarto.doc.add_html_dependency({
+  name = "grid-htext",
+  version = "1.0.0",
+  stylesheets = {"resources/css/grid_htext.css"}
+})
+end
+
+local function grid_no_htext()
+  quarto.doc.add_html_dependency({
+  name = "grid-no-htext",
+  version = "1.0.0",
+  stylesheets = {"resources/css/grid_no_htext.css"}
+})
+end
+
+
+if quarto.doc.is_format('revealjs') then
+  -- Ensuring the dependencies got loaded before proceeding
+  ensureHtmlDeps()
+  function Pandoc(doc)
+    local blocks = doc.blocks
+    local str = pandoc.utils.stringify
+    local meta = doc.meta
+    if meta['sc-sb-title'] then
+      sc_sb_title()
+    end
+    if meta['header'] then
+      grid_htext()
+    else
+      grid_no_htext()
+    end
+    local header_text = meta['header'] and str(meta['header']) or " "
+    local header_para_class = {class = "header-text"}
+    if meta['title-as-header'] then
+      header_text = meta['title']
+      header_para_class = {class = "header-text title-text"}
+    end
+    if meta['subtitle-as-header'] then
+      header_text = meta['subtitle']
+      header_para_class = {class = "header-text title-text"}
+    end
+    -- make divs structure for holding text and logo.
+    local header_logo = meta['header-logo'] and str(meta['header-logo']) or ""
+    local header_logo_link = meta['header-logo-link'] and str(meta['header-logo-link']) or ""
+    local footer_logo_link = meta['footer-logo-link'] and str(meta['footer-logo-link']) or ""
+    local header_img = pandoc.Div(pandoc.Image("", header_logo, ""), {class = "header-logo"})
+    
+    if header_logo_link ~= "" then
+      header_img.attributes['header-logo-link'] = header_logo_link
+    end
+    
+    if footer_logo_link ~= "" then
+      header_img.attributes['footer-logo-link'] = footer_logo_link
+    end
+    
+    local header_section = pandoc.Div(pandoc.Para(" "), {class = "sc-title"})
+    local header_sbsection = pandoc.Div(pandoc.Para(" "), {class = "sb-title"})
+    local header_para = pandoc.Div(pandoc.Para(header_text), header_para_class)
+    if meta['hide-from-titleSlide'] then
+      local hide = str(meta['hide-from-titleSlide'])
+      if hide == "text" then
+        header_para.attributes['hide-from-titleslide'] = "true"
+      elseif hide == "logo" then
+        header_img.attributes['hide-from-titleslide'] = "true"
+      elseif hide == "all" then
+        header_para.attributes['hide-from-titleslide'] = "true"
+        header_img.attributes['hide-from-titleslide'] = "true"
+      end
+    end
+    local div = pandoc.Div(
+      {
+        header_img,
+        header_section,
+        header_para,
+        header_sbsection
+      }, 
+      {class = 'reveal-header'})
+    table.insert(blocks, div)
+    return doc
+  end
+end
\ No newline at end of file
diff --git a/Hetero-And-Macro/central-banks-hark-and-ssj.md b/Hetero-And-Macro/central-banks-hark-and-ssj.md
index dcd6965..4656a20 100644
--- a/Hetero-And-Macro/central-banks-hark-and-ssj.md
+++ b/Hetero-And-Macro/central-banks-hark-and-ssj.md
@@ -2,16 +2,26 @@
 title: Econ-ARK for Central Banks
 author:
   - name: Christopher D. Carroll
-    orcid: 0000-0002-1234-5678
+    orcid: 0000-0003-3732-9312
     email: ccarroll@llorracc.org
     affiliations: 
         - Johns Hopkins University
         - Econ-ARK
-format: clean-revealjs
+format: 
+    metropolis-revealjs: default
 html-math-method:
   method: mathjax
   url: "https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"
 date: last-modified
+date-format: "MMMM DD, YYYY"
+footer: <https://econ-ark.org>
+slide-number: true
+embed-resources: true
+logo: ../numfocus-logo.png
+reveal-header:
+    sc-sb-title: true
+    header-logo: ../econ-ark-logo.png
+    header-text: Powered by Econ-ARK
 ---
 
 
diff --git a/econ-ark-logo.png b/econ-ark-logo.png
new file mode 100644
index 0000000..e9db35a
Binary files /dev/null and b/econ-ark-logo.png differ
diff --git a/numfocus-logo.png b/numfocus-logo.png
new file mode 100644
index 0000000..4a6f9a4
Binary files /dev/null and b/numfocus-logo.png differ