Add shortcut tooltips like in Excel

I've been using Jetbrains IDEs for a year now and they're great. I don't feel like a pro though because I haven't mastered all the shortcuts. They're quite elaborate, which is of course understandable because your IDEs do so much.

In Excel there's a useful freature where if you push ALT on an open worksheet, letters will appear in the ribbon indicating what the letter shortcut for each tab is.

It'd be nice if I could press ALT/Meta/some key or a series of keys, in a Jetbrains IDE, and be given some clue about what the shortcut is for the workspace's visible buttons.

I don't think you'd need to go much further than that since most people probably set their most frequently used commands as buttons on the workspace. If this were in place, I'd probably remove buttons as I began memorizing the shortcuts.