Update width of media section for wider main content area and whether media is enhanced or not.

Author: stevepiercy

docs/contributing/documentation/myst-reference.md

@@ -117,9 +117,13 @@ Configuration in the {file}`conf.py` files for the main documentation and its su
 
 #### Width of media
 
-The main content area of a page in the documentation is 743 pixels wide.
-When taking screenshots or videos, resize your browser window, or try to limit the width of your media to 740 pixels.
-This will preserve legibility of images.
+The main content area of a page in the documentation is 790 pixels wide.
+When taking screenshots or videos, resize your browser window, or try to limit the width of your media.
+This will preserve legibility of images and videos when displayed inline.
+
+If you {ref}`enhance-images-label`, constrain the width of your media to 760 pixels, to accommodate the padding and margins from the enhancement.
+
+If you don't enhance images, constrain the width of your media to 790 pixels.
 
 
 (enhance-images-label)=