Here's a way to show the popup by setting a single key like "?" like in the readme
(defvar aw-dispatch-alist
'((?x aw-delete-window "Delete Window")
(?m aw-swap-window "Swap Windows")
;;; omitted.
(?o delete-other-windows "Delete Other Windows")
(?? aw-show-dispatch-help))
"List of actions for `aw-dispatch-default'.")
How to show the aw-show-dispatch-help popup by C-h key during ace-window is invoked to be more emacsish like?