General
Ctrl+ZUndo
Ctrl+YRedo
Scissor Tool
RRotate selection +15°
Shift+RRotate selection -15°
PStart paste preview
Tools
FreehandClick & drag to draw
LineClick & drag for straight lines
Spray CanClick & drag to spray
Mirror DrawDraw with symmetry
ScissorDrag to select, Paste to place
DistortionClick & drag to distort
StampClick to place stamps