Gear maker

File attached.

I have a drawing with only 2 shapes in it and I want to subtract the orange one to make a hole in the green one. No matter what Operations button I hit everything disappears. I reverse the order of the layers and still everything disappears. See the attached video. I'm just doing a cmd Z between each to get them back. What am I doing wrong?

Thank you MEB. That took care of the first problem. On the second I would swear that was one of the methods I tried. But it worked this time. Oh well. I noticed that sometimes when I was working some of my wedges, which have no fill just a 0.1 stroke in black, changed color to be a pinkish purple after I hovered over it. At times I had 3 or 4 out of 30 that were this color. What does that mean? How do I get them to be black again?

I'm having a problem with the Power Duplicate. Actually 2 problems. 1. How do I duplicate with out Power Duplicating? I duplicated (cmd J) then moved the duplicate. Then I wanted a duplicate of the second shape in the same position and orientation but AD moves the third (created by a cmd J) in the manor I had moved the second (a Power Duplicate). So I have to fight to get the third back to the position of the second. There must be a way to cmd J without it doing an auto Transform. 2. I have two shapes a circle and a wedge of it, like a thin slice of a pie (except the edge of the wedge is not just a plain arc). I need to rotate 5.625 degrees (keeping the center of the wedge in the center of the circle) and do this several (64) times. The help instructions for Power Duplicate say "duplicate, then transform, then duplicate" so I zoomed in on the edge of the wedge then hit cmd J and ran into the problem 1 above. So I did an undo. The PD video shows holding down alt (option) key when dragging the original to make the duplicate, so held down option (to create the duplicate) and control (to rotate around the center of the pie) then grabbed the rotate arrows just off the corner of the bounding box, next to the broad end of the wedge and rotated. It did not make a duplicate, without the original being also there I could see exactly how far to rotate the item. Why am I not getting a copy? Just holing down the option key (without control) I still do not get a duplicate. Does PD not work for just a rotate, is a move also required? Or does On another topic, I just tried Separated Mode along with having two views of my drawing open. So I could have one zoomed out and one zoomed in close. Fantastic. Makes makes accurate movements so much easier.

That worked. Thank you. Good program. Very supportive staff and members.

Does anyone have a suggestion on how to find the exact center of a shape post creation, and even trickier post rotation? Like if I want to place a small star in the exact center of a large circle. So far the only way I can find is to make a large star, move it around with changing the size until all points contact the circle, then reduce the size of the star making sure it stays centered. In other products the center anchor point can be displayed, then guides can be dragged to mark the exact center to indicate where the star is to be started.