updated the docstring and the output format

Author: lsawade

docs/source/parts/gf-extraction/index.rst

@@ -98,6 +98,28 @@ A normal query for a subset from a hosted database would look like this
     The ``--`` is important for entering negative numbers. It's hard for CLI to
     distinguish ``-option`` and a negative number. Hence, ``click`` implements the ``--`` which tells the CLI to take all following command line arguments are, in fact, arguments and not options. For details, please visit: `click: option-like-arguments <https://click.palletsprojects.com/en/8.1.x/arguments/#option-like-arguments>`_.
 
+Other examples are:
+
+.. code:: bash
+
+    # Query info
+    gf3d database query info princeton
+
+    # Get query URL
+    gf3d database query info --debug princeton
+
+    # Get available stations query url
+    gf3d database query stations --debug princeton
+
+    # Get query URL for subset
+    gf3d database query subset --debug -- princeton testquery.h5 -31.1300 -72.0900 17.3500 28.0
+
+    # Get query URL for fortran ordered subset
+    gf3d database query subset --debug -- princeton testquery.h5 -31.1300 -72.0900 17.3500 28.0
+
+    # Get query URL for fortran ordered subset
+    gf3d database query subset --debug -- princeton testquery.h5 -31.1300 -72.0900 17.3500 28.0
+
 
 
 OLD command line tool

src/gf3d/bin/gf3d_exec.py

@@ -234,8 +234,20 @@ def subset_extract(
         gf3d query synthetics - - ARG1 ARG2
 
     \b
-    PARAMETERS
-    ----------
+    OUTPUT FORMAT:
+    --------------
+    \b
+                                                   #                          itypsokern
+        <outdir>/NET.STA.S3.MX{N,E,Z}.mseed        # for the synthetic        0
+        <outdir>/NET.STA.S3.MX{N,E,Z}.<par>.mseed  # for the kernels
+                                                   # par = mrr, mtt, mpp,     1
+                                                   #         mrt, mrp, mtp,
+                                                   #       lat, lon, dep,     2
+                                                   #       cmt, hdr           3
+
+    \b
+    PARAMETERS:
+    -----------
 
     \b
     SUBSETFILENAME = file containing Green functions of a subset of elements