I have "Function keys" dialog in the Quick Acces Toolbar. I don't remember most of the function keys so most of the times I open this dialog.
It would be interesting that we were able to double click on arow to execute the selected action. Or Reset (Pop-up menu to select "Execute")

(obviously, If I do double click, the "Function keys" dialogwill be closed).
Also, a new column called "Description" where the user can add a Description.

Regards.