@MonsieurBon Thanks for the suggestion, but I finally figured out what needed to be done in my situation. I had my UI scale (x-Plane Graphics Settings) set to 150%, which apparently causes the grey arrow to appear way up at the top of my monitor. And when I click the grey arrow, only the bottom row of the panel selector appears, which prevents me from selecting any of the buttons on the top 2 rows. When I changed my UI scale back to 100%, that solved my problem completely. The grey arrow now appears about 1/3 of the way down from the top of my monitor, and when I click it, the entire panel selector appears with all 3 rows accessible. All good now, thanks again for your help!