I'm working through the helmet polygonal modeling tutorials for Maya 2010 and I'm stuck on the step were you have to extrude the polygon mesh mouth piece. I select the mesh then go Edit Mesh > Extrude and nothing happens, no arrows or nothing. Even when I select the show manipulator button from the tools side bar nothing happens! Please help me! I really want to complete the tutorial but I cannont advance past this problem.
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P.S- Sorry for being so green I just started using the program.