A.K.A. On-Screen Keyboard Display.
Basically a way to check which button on your keyboard controls which direction RCS thrusters rotation or translate your craft. I'm always messing up which button I need to press to align the docking ports and then I start to panic-button-spam as I continue to mess up until the inevitable happens, forcing a reload to a previous save.
So I'm trying to think of ways to unobtrusively display the controls on the screen when in Vessel View. Maybe a small keyboard in a window with the keys highlighted in the color of the direction they control?