Cntrl + Z, Cntrl + Z, CNTRL+Z!!!!!!!
This hasn’t really come up at WWA, but since so many designers are now working in AC19 & subsequently revisiting or rethinking their work environment, I thought I’d throw this out as food for thought.
You can set the undo limit in ARCHICAD in the work environment. It can be set to as high as 99 steps. At some point you have to ask yourself, is it faster to just redo? But in any case, you can make this adjustment to your work environment.
I have been told that this may eat up some RAM, so if you are working on a laptop or old PC you may want to keep the limit low.