Keys
C toggle cable tool • Cable Tool On → click to place points → Double-click / Enter / Finish Cable to commit
R rotate clockwise • Shift+R counter-clockwise
↑ / ↓ scale selection up/down
[/] send back / bring forward • Shift+[/Shift+] to back / to front
D duplicate • G group • Shift+G ungroup
L lock/unlock selection • Del delete
Ctrl/Cmd+Z undo • Ctrl/Cmd+Shift+Z redo
Locked items are click-through; unlock from Layers.