How to Debug Key Mappings in Vim

Sometimes my mapping not working since overridden by plug-in or I forget a mapping and want to select from all my mappings list.

All List

If you want to get all your key mappings run:

Specific Key

If you only want to know specific key(s) run:

Like examples below:

Verbose Mode - Show Overridden

If you can't use your mapping and want to know what overrides it just run with
verbose:

This will show all configs that uses given mapping in a list and last
set location:

Also it is possible to use :map with visual, normal, insert etc. as
well:

All done!