Org mode export dispatcher nil and key binding

Question

I have two questions for exporting org file to PDF:

1. I would like not to open Org Export Dispatcher when my org file export to pdf through LaTeX. I checked the manual, then I found the following:

   When the variable org-export-dispatch-use-expert-ui is set to a non-nil value, Org prompts in the minibuffer.

So, I set the following at my init.el. But it does not work. Are there any wrong for this setting?

(setq org-export-dispatch-use-expert-ui t)

2. To export a org file to a PDF file, I have to type C-c C-e C-l C-O. I don't like this key binding because of too much typing. Could you help me to set a concise keybinding?

Answer 1

For part 2), you can go directly to the export function of interest and bind it to any key you want, e.g a function key, say F8:

(define-key org-mode-map [f8] (lambda () (interactive) (org-open-file (org-latex-export-to-pdf))))

Here we have to combine a couple of functions to do the export and then the open of the resulting PDF file. Note also that we have to label the function as interactive i.e. make it a command. And finally, note that you lose the ability to select options (line async, subtree etc.) which the dispatcher allows you to use with an export: those are passed as optional arguments to org-latex-export-to-pdf by the dispatcher, but the above passes no arguments at all.