Ok so another question...

Say if I'm making a shape - like a cylinder but with one end larger than the toher (like a cone without the sharp end).

I make it out of 2 circles, a small one and a large one.
Then I apply a loft.

Nice, there's my shape.

But there's also those 2 circles that I used to make the shape - they're still there. When I move or change the circles, the shape changes, too.

So my question is this...

Am I supposed to keep the circles after I've used them to make my shape?

Or should I delete them?

What if I want to be able to change my shape later? It seems to be easier to change the shape using these 2 circles than it is to change the shape by itself...

A fundamental question :)