defer loading

settings/org-settings.el

@@ -1099,6 +1099,7 @@ Uses function `my-org-headline-string-element'"
                'my-org-latex-ensure-clearpage))
 
 (use-package ox-extra
+  :defer 0.1
   :after (org)  ;; defer t is not enough bc/ ox-extra is not loaded by default
   :config
   ;; https://emacs.stackexchange.com/questions/9492/is-it-possible-to-export-content-of-subtrees-without-their-headings