Save: Ctrl+S

Copy: Ctrl+C

Paste: Ctrl+V

Cut: Ctrl+X

Play: Space

Undo: Ctrl+Z

Redo: Shift+Ctrl+Z

Delete: Del/Back

Split: Ctrl+B

Select all: Ctrl+A

Multiselect: Ctrl+ mouse

Move 1 frame right: →

Move 1 frame left: ←

Group: Ctrl+G

Ungroup: Shift+Ctrl+G

Layer forward: Ctrl+]

Layer backward: Ctrl+[