following tutor4u video making a mic (part 2) I came upon extrude region vertex normals for the mic stand bracket. selecting extrude region vertex normals I attempt to add .1 and enter, but the extrude only moves down in the z direction. also when I click on extrude region vertex normals with my mouse and slide the mouse over the working window the extrude begins (downward in the z direction) by my just moving the mouse in any direction on working window. The video does not show any problem like I'm having, I'm sure I have all settings the same as the tutorial. I'm using Blender 2.79 (same as tutorial) only I'm using a mac computer, tutorial appears to be windows OS. I also made sure no vertex duplicates.