The Color picker palette can become hidden behind the TM application window if you click on the model before closing the color picker. The issue was related to adjusting surface color. I was working on a TM rendering yesterday and most of the functions and navigation seemed to be frozen. I know this has come up in the TM lunch and learns we have done at least once, and Matt explained it to me in person, but until I actually experienced it, the “freeze up” didn’t really make sense.