What exactly are you doing?
Are you trying to select via Shift+click? If yes, try selecting items in Layers Panel and from the fly-out menu, choose Select items and see if it works.
Thanks for the quick reply. I finally worked it out. Somehow, I had
anchored the graphics and couldn't release them.
I appreciate much the quick reply. Turns out I'd inadvertently
anchored the graphics and had trouble releasing them. Problem is solved.