How do I add in a octagon shape from a plane mesh? I'm new to Blender and currently watching tutorials on modeling. In this video, at 6:50, the person adds a Plane mesh that is already in a octagon form; it has 4 vertices but looks like an octagon. I've been trying to find out how he did this but can't find out the answer.
To have an octagon out of a square (4 vertices) add a subsurf modifier



To make a real octagon add a mesh>Circle and make it 8 vertices: