At least 3 times so far I've thought I was set to draw rectangles but in fact I just dragged lines right across my map. It's really tedious going back and manually editing each and every flub created by this. Can we please have an UNDO option and (hopefully) and UNDO history.
#EDITOR REQUEST: Undo Options
mighty plover
icy steeple
The Help panel tells you the exact key combos you need for undo and redo