\(KEY DESCRIPTION ACTION)-- where KEY is a free character triggering the action,- DESCRIPTION is a string defining the action, and ACTION is- a function that will be called with three arguments:- SUBTREEP, VISIBLE-ONLY and BODY-ONLY. See `org-export-as'- for further explanations.-- Valid values include:-- \(?l (?P \As PDF file (Beamer)\ org-e-beamer-export-to-pdf)- \(?O \As PDF file and open (B