How to turn a plane into a prism? I'm new to Blender.
I'm wondering if it's possible to turn a plane into a solid figure by transforming it to a prism with the plane as its base? Pretty much like that, with the difference that this is a cube shrinked to a height of 0 and I want to achieve this with a plane:
As @JohnEason pointed out, in Edit Mode with my plane object selected, I can press E (and Z) to create a three-dimensional prism out of my polygon.