Reporter: stevage
[Submitted to the original trac issue database at 12.02am, Friday, 10th February 2012]

There are a few keys that do stuff that isn't entirely obvious (eg G, D, M, C...). You can hit them by accident and not be sure what you hit, or how to do undo it.

Suggestion: For keys like this, briefly flash a little message box like "D: map dim toggled"