It would aid user experience if it was possible to look through all attached images and videos on an issue with arrow keys (and/or as buttons below the image) when enlarged, and to close the image/video by clicking anywhere around it, rather than just the X on the top-right.

EDIT: I've noticed this is already a feature but appears to be inconsistent in that it sometimes doesn't appear to work. Specifically, on this Feedback Tracker issue (FT-62) the images are posted inline and work differently than those attached in this Reforger Experimental issue (AREXP-125)

P.S. it appears even more broken as clicking to enlarge an image does not work on an issue like FT-62 if you open it as a link or type in its URL. Enlarging only seems to work if you navigate to the issue though the issues list.