Paint cluster - Left-click in viewport
Paint continuous - Left-click drag
Erase cluster - Shift + Left-click
Erase continuous - Shift + Left-click drag
Cancel current stroke - Esc (during drag)
Rename layer - Enter to commit, Esc to cancel
Multi-select layers -Ctrl-click rows
Ctrl+Z is bound to UE's global transaction system, not to FT_Chaos's undo. See Undo section for details.