I am tinkering with a DAW like program FL Studio. I must say customization is awesome. One beautiful program. But one thing, that I don't see often just done right. "Hint Panel" a small panel (movable / dockable). Whatever you point your mouse at, it tells you what it is and gives you a shortcut key. I like it significantly more than tool tips pop ups which I've used for years. This is so simple, yet so effective. Maybe something like this?

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