ctrl + o : Open new sprite file

ctrl + s : Save sprite to file

0 : select color 0 (background)

1 : select color 1

2 : select color 2

3 : select color 3

space : Play/Stop animation

left/right arrow : Navigation within the frames

home/end : Jump to first/last frame

ctrl + c : Copy frame contents

ctrl + v : Paste frame contents

Insert : Add new empty frame

Delete : Delete current frame

ctrl + z : Undo last operation

ctrl + y : Revert undo

ctrl + e : Toggle export popup

esc : Close all popup windows