that's not what my g'friends say! Not sure I know what a g'friend is :=) ... but since you've revived this thread:
xZGV has brightness etc image controls available via keyboard commands. Unfortunately GQView doesn't seem to, or I can't find them if it does, apart from zoom and rotate/mirror etc.
I sent another image viewer to extensions over the weekend which is the probably the tiniest available, and it has brightness, gamma controls, frameless fullscreen etc - but it has no GUI and it doesn't do thumbs - you can't have everything. But certainly is cute.
Despite the irritation that xZGV doesn't seem to do frameless fullscreen in fluxbox, it does imho seem to overall be the best choice for dsl for the footprint.
original here.
