Here’s my challenge completed, along with a note about a problem I had completing it.
As I started the challenge for this section, I quickly found that I couldn’t change anything in the Operator Panel after adding a mesh. The entire panel was disabled! After fighting with this for a while, I realized that instead of setting the User Preferences -> Editing -> Undo -> Memory Limit to 0 (zero), I had set the Steps (in the same section) to zero. Since it wasn’t obvious to me why setting undo steps to zero would disable the Operator Panel, I’ve shared my story in case anyone else runs into this.
