excellent - but how to use "Access Key" field? Rated 5 out of 5 stars

Great tool. The main feature I want is a keyboard shortcut to activate an items. I see an "Access Key" field which accepts on character, but how is it used? Thanks for the extension!

This review is for a previous version of the add-on (2.6.1).  This user has 2 previous reviews of this add-on.