When you are sharing your screen the floating control gets in the way on the top of the screen when you are trying to access drop down menus. I know you can move the bar out of the way or make it invisible temporarily. I wonder why there isn't an option to make the floating control Vertical and I can dock it against the left or right edge of the screen which is less frequently used.
Sounds like an opportunity for a feature request! The volunteers in the Zoom Community don’t handle feature requests, but you can use this Zoom web page to make a feature request directly to Zoom staff: https://www.zoom.us/feed