Virtual keyboard width
When I open the virtual keyboard on my MacBook laptop the keyboard extends beyond the width of the screen, so there is a scroll bar at the bottom. The scrolling slows down work flow, so it is more desirable to resize the keyboard, smaller.
I resize by pressing the command key and scrolling over the keyboard towards the left.
The increments decrease the size so that it is smaller than the width of the workspace.
Ideally, it would have a way to "simply fit to width", but that's not the bug.
But the minor bug happens when I quit and restart MuseScore. After restarting MuseScore does not remember the size of the keyboard and the entire resizing process must be repeated.
I'm not even sure if this is in fact a bug or just a feature in need of minor improvement. Marc advised me to report it here so I took his advice.