My font is meant to be all-white, so it's a little hard to see in both the pixel editor and the glyph grid—unless I work on it inverted to black. That's a decent workaround, but a choice of 2 or 3 checkerboards (light, medium, dark) for transparency would be awesome! Or if not that, maybe just have a darker checkerboard built in to some of the UI themes—like Topeka.
Caps is a great tool already, though! Thanks!