Thanks DaveR; that did the trick.
To answer your question, it’s not supposed to be anything; I was just experimenting with Sketchup features. I started with a rectangular shape and didn’t have a problem making that move, changing the rectangle into a trapezoid. It’s when I shifted the rectangular shape at various angles that I was having issues with the move.
Didn’t know about the “Alt” function, or Auto-Fold, and quite frankly the Sketchup help, is not very much help. In fact now that I know about it I did a search for “ALT” in the help center. [https://help.sketchup.com/en/help-search?keys=Alt] and none of the responses was useful in explaining the “ALT” and how it could affect various Sketchup functions.
Thanks again for your help,