I'm using Maya 8.5 on a MAC but working with 4.5 tutorial(PC?). I'm making a layered texture so I'm trying to drag my "file1" node from the hypershade into the "alpha" option in the attribute editor. The instructor says to "middle" click the node(file1) and drag it onto the "alpha" section in the A.E. When I try it the hypershader just pans. I notice the instructor gets a plus sign icon when he hover over the "file" node which I can't seem get. I'm not using a 3 button mouse, I am using a 2 button mouse with the center wheel acting as the middle (so I have to hold down the "apple" key then use "middle" wheel button. What am I missing here!! Help!