Canvas
Add a componentdrag from palette · or click
Connect two boxesdrag a ○ port onto a box
Rename a boxdouble-click it
Add a notedouble-click empty canvas
Duplicate a component⇧ Shift-click
Selected connector
Cycle arrowheads (incl. double)A
Straight ↔ elbow routingE
General
Undo · RedoCtrl+Z · ⇧Z
Delete selectionDel