There is button near ZAdd/ZButton namely zcut. and It is disabled. and I didnt find any official or unofficial tutorial to see what it is and how it acts. do you know anything about it ? (thanks)
It’s a legacy 2.5D feature. You can cut holes in models that have been ‘dropped’ to the canvas (i.e. that aren’t in Edit mode). It only works for 2.5D painting, not 3D modeling.