Keyboard shortcuts

The same list is in the application under Help ▸ Keyboard shortcuts. On macOS, Ctrl here means the command key.

Tools

Single keys, no modifier.

KeyTool
VLights
ZZoom
HHand
BAdd stroke
ERemove stroke
CCut outline
FFlatten
ATube axis
DIn front
OConvex area
IConcave area
TTrust methods

Files

KeysAction
Ctrl+OOpen a project, or a settings preset
Ctrl+SSave the project — artwork, hints, settings and lights
Ctrl+Shift+SSave the project to a new file
Ctrl+Shift+OImport a base sprite
Ctrl+Alt+Shift+OImport a set of animation frames
Ctrl+Alt+ORe-read the imported document, keeping its layer mapping
Ctrl+EExport the normal map

Reload is Ctrl+Alt+O and deliberately not Ctrl+R or F5, which a browser takes for its own reload — the one keystroke that would throw away every painted stroke. Read it as "open, again".

View

KeysAction
Ctrl+=Zoom in
Ctrl+-Zoom out
Ctrl+0Fit the sprite on screen
Ctrl+1Show actual pixels
Ctrl + scrollZoom around the pointer, from any tool

Painting

KeysAction
Alt + dragErase from the current hint layer
Right-dragErase from the current hint layer
Ctrl+ZUndo a stroke
Ctrl+Shift+ZRedo a stroke

Undo covers painting only. One drag is one step, however many mouse events it arrived as. Settings are not on the undo stack — they have their values written beside them, and undo that sometimes moved a control you were not looking at would be worse than none.

Frames

KeysAction
,Previous frame
.Next frame

Punctuation rather than the arrow keys, which belong to whatever has focus, and rather than the bracket keys, which mean brush size to anyone arriving from Photoshop.