For example, I've imported a logo from Illustrator into Blender. I want to extrude the paths, but guess what? Blender refuses to do so. The "e" key only translates my shape, not extrudes it. My selection options aren't there either, so if I want to switch to line selection, or face selection, I'm out of luck.
Why does Blender treat imported points differently than native points? And is there a way to convert them?