As in question title, is there a way to flat plane object affecting by proportional edit without creating new plane object?
here my image :
I don't know how to flat this object except create new plane object or edit position of vertex to z=0 individually.


Sand thenX,Y, orZ. Note you may want a custom axis which would make it a little more difficult but possible. – J Sargent Sep 06 '16 at 13:40S> axis > 0). See http://blender.stackexchange.com/questions/7729/how-to-flatten-a-face-to-avoid-distortion-make-an-ngon-planar and http://blender.stackexchange.com/questions/33087/bring-all-planes-in-mesh-to-same-level – Mr Zak Sep 06 '16 at 14:09