@pixelcruncher I was going to prepare a car paint material pack and thought it would be nice if I could have my custom material preview, nothing serious.
car paint.PNG
@Dave-R Got it! Thanks Dave...it did seem like overkill to lock both the viewport and the layers, but it seemed like one of my viewports was shifting (even though camera positions weren't changed) and I thought maybe I had been double-clicking into the viewport(s) w/o realizing it. Still not sure what I did, but it seems to be working now.