I have a cylinder and I want to extrude only a small portion of one of its faces inwards. How would I do this?
Let's assume you want the extrude a small portion of the plan(a). plan(a) is 1m*1m . We will extrude 0.5m*0.5m know as plan(b):
Select plan(a), (1)use the extrude fonction but do not extrude yet
(2)change to scale fonction and now you can extrude. You have now the plan(b) inside the plan(a). With both plan perfectily aligned.
(3)Now you can extrude plan(b)