Update packages.md

draft/packages.md

@@ -28,7 +28,57 @@ In the `boot` method of your service provider, you can define permissions for yo
 
 ## Layouts
 
-// ...
+The `Layouts` class is grouping several ones; to add a new feature to it, it is enough to specify it in the service provider as:
+
+```php
+use Orchid\Screen\Layout;
+use Orchid\Screen\LayoutFactory;
+use Orchid\Screen\Repository;
+
+LayoutFactory::macro('hello', function (string $name) {
+    return new class($name) extends Layout
+    {
+        /**
+         * @ string
+         */
+        public $name;
+
+        /**
+         * Hello constructor.
+         *
+         * @param string $name
+         */
+        public function __construct(string $name)
+        {
+            $this->name = $name;
+        }
+
+        /**
+         * @param Repository $repository
+         *
+         * @return mixed
+         */
+        protected function build(Repository $repository)
+        {
+            return view('hello')->with('name', $this->name);
+        }
+
+    };
+});
+```
+
+Then on the screen, the call will look like:
+
+```php
+use Orchid\Support\Facades\Layout;
+
+public function layout(): array
+{
+    return [
+        Layout::hello('Alexandr Chernyaev')
+    ];
+}
+```
 
 ## Icons