Am I missing something? I tried the usual Control, Shift, etc HOLD + click to try and edit multiple sprites with the same settings at the same time but no dice. Bonus points if allowed to click and drag to select an area of sprites to edit.
Also, an option to start with a "flat" canvas (all sprites in the same layer with the same "pattern", and the same depth and zscale applied, that way we can apply volume as we see fit.
Awesome job on the emulator, thanks