General interface overview
Undo
Press Cmd + Z or click in the menu on Edit then Undo
⌘Z
Menu > Edit > Undo
Redo
Press Cmd + Shift + Z or click in the menu on Edit then Redo
⌘⇧Z
Menu > Edit > Redo
Zoom in
⌘+
Menu > View > Zoom in
Zoom out
⌘-
Menu > View > Zoom out
Zoom area
⌘ space & drag
Move
Press space bar and drag
space & drag
Brush editor
Press ctrl to display the brush editor
ctrl
Ruler
Press ⇧ to draw straight line
⇧