Is there a way to disable the default copy option for the mirror command?
Yeah, I know you can uncheck it, but I want to know if there's a way to have it not checked by default.
Ah, sorry, see what you mean.
I checked the INI, nothing you can do with the UI system file, nothing editable in keyboard shortcuts. Only way is probably with a c# / vb.net macro unfortunately.
It is annoying though!
But also toggling can get annoying, unfortunately there is no option to leave it unchecked. Hopefully they incorporate it in Revit 2020.