Mac: resizing objects

I’m having trouble resizing objects. When I drag, the size jumps incrementally instead of a smooth resize (hope that makes sense). Is there a way to input the exact dimension I want?

I’m trying to get a the base of a cylinder to be the same size as the base of a truncated cone (these two surfaces will eventually be merged).

Hello - make sure Grid Snap is not on (Snap command), that is the most likely problem. You can always enter an exact size: set the base point, a reference point, then type in the desired distance between those two points, and Enter.