Is there a way to display what a given key is bound to?

I have this functionality in another editor I use and I find
it incredibly useful both to help find a command I vaguely
remember the keystroke for (is it ^K^N or ^K^M?) and to
discover new functionality.

Currently the only way I found to do this is via customize
keyboard dialog where there is a "Shortcut currently used by"
field.

Thanks,
Keith