B Paint
E Erase
V Select
H Pan · hold space
1–0 Colours
N Bloom a motif
X Y Fold left/right · top/bottom
R Rotate piece
L Lines between empty
S Lines between filled
⌘Z Undo · ⇧⌘Z Redo
⌘CXV Copy · Cut · Paste
⌘A Select all
⌫ Delete selection
⌘0 Fit view
+ − Zoom
esc Deselect / close
? This card