O

Orbit

B

Paint

E

Erase

A

Add

F

Fill region

I

Pick colour

X

Box (click two corners)

Esc

Cancel a box

⌘Z

Undo

⇧⌘Z

Redo (also ⌘Y)

R

Reset view

?

This list

With an edit tool, left-drag edits and right-drag orbits. On Windows and Linux, use Ctrl for ⌘.