Feature Request: Highlight Middle C on the Input Keyboard

The keyboard thingy at the bottom of the screen is quite useful for inputting notes with the mouse, TBH. But since it can be and often needs to be dragged around to reach the higher and lower notes, it would be very useful if middle-C on that keyboard could be highlighted so that you can tell at a glance what note you’re about to input.
It’s currently marked with a tiny C4, but something more immediately visual would be useful.