Content images used to be stuck at the width of the column. Now any of them opens full size in an overlay: click or tap to enlarge, Escape or a click outside to close.
It shipped in Inkwell 0.14.0 as a small piece of quiet-theme JavaScript, plus one change in the image pipeline so each image remembers its original URL. The lightbox shows the true file, not a resized copy. The Domestique screenshots were the reason I finally wanted it.