In Emacs org-mode, how would I instruct org-mode to make HTML code blocks folded by default? So that when I open an org file they are folded?
org-mode provides this feature out of the box. You can set it globally by customizing the variable org-hide-block-startup. To set this for a single file, add
#+STARTUP: hideblocks
To the header. Here's the relevant section of the manual
来源：https://stackoverflow.com/questions/21540593/in-org-mode-how-to-make-code-blocks-folded-by-default