Or hold Command (⌘) if they have a Mac and KeyCue.
(It uses the accessibility information for the visually-impaired to construct an exhaustive list of every possible key-binding in the current application context. Another example of many of designing for accessibility paying dividends for beneficial, unintended uses.)
KeyCue lets you perform the action by interacting with the semi-transparent HUD and has themes to make adjustments. 20 € is crazy high for modern app pricing, definitely not at an optimal supply-demand point.
Here's the zillions of options, which vary widely in usefulness:
Plus, you're buying support and sustainability (unless someone were to torrent it, which risks malware and reduces support & sustainability).
Cheat is very limited. It won't show modifier-only keys as KeyCue does, and it won't even let me take a screenshot of it (because that involves Shift).
Minimal and free, or expensive, pretty with features: pick one. ;)
