Keyboard shortcuts

Tools

VMove / Transform
CCrop
BBrush
EEraser
UShape
TText
IEyedropper
Alt + click (Brush)Sample color under cursor
[ / ]Decrease / increase brush size

Edit

Ctrl + ZUndo
Ctrl + Shift + Z or Ctrl + YRedo
Ctrl + JDuplicate active layer
DeleteDelete active layer
Enter (Crop tool)Apply crop
EscCancel crop / close dialog (cancels Curves)

View

Scroll wheelZoom at cursor
Space + drag / middle-dragPan canvas
+ / -Zoom in / out
0Fit image to window
1Zoom to 100%
Hold \Compare with the original (filters off)

File

Ctrl + SSave project to browser
Ctrl + EExport image
Ctrl + OOpen image or project
Ctrl + VPaste image from clipboard