I am sorry if this has been asked before, but I couldn't find it. I want to be able to add a plane, and have that plan create a vertex at each grid point as I extrude it.
When you first add a plane you get a 2x2 plane. (2x2 relevant to the grid). I want to be able to select one edge of this plane and extrude it (or just drag it) to make it bigger, but as I drag it, I want it to make vertex that match the grid so that I can select any square I want to extrude it further.
This seems like it should be a pretty standard feature, but I can't find how to do it. I ask because I am following this guys video tutorial and it appears that he does it, but he doesn't explain how. I assume he hit a keyboard shortcut. Watch how after the extrudes it a little, he can immediately select points along the edges to extrude futher. Then he does something and seems to make the whole thing red, and it shows all the squares that make up the plane and you can see its vertices. How do you do this?