Guys, I just want to be able to click on a already created circle (a drill hole) and change the Diameter to an exact length. But every time I try and do this it seems to prompt me to make a new circle that then wont accept my minimum requirements or anything.
Sorry I am new to this program, so any pointers or links to relevant tutorials would be much appreciated
Rhino is not a parametric modeler. There are no adjustable parameters to alter existing geometry.
Command History can get you part way to something approaching parametrics as well as using Grasshopper, but general Rhino surface modeling is not parametric.