Fold some headers by default.

work-notes.org

@@ -45,6 +45,9 @@
   #+END_SRC
 
 * Forcing Org-mode to ignore the timestamps <2021-11-20>                :old:
+:PROPERTIES:
+:VISIBILITY: folded
+:END:
    Before today, I used to need to call
    #+BEGIN_SRC elisp :results silent
 (org-publish-remove-all-timestamps)
@@ -54,6 +57,9 @@
    =t=, as seen in the above code blocks.
 
 * Seafile problem <2020-02-17 Mon>                                      :old:
+:PROPERTIES:
+:VISIBILITY: folded
+:END:
 ** Problem
    After another update, Seafile started telling me this when I tried
    to start it:
@@ -124,6 +130,9 @@ export XDG_DATA_DIRS=$HOME/.nix-profile/share:$XDG_DATA_DIRS
    package to comply with the new [[https://hydra.nixos.org/build/96804884/download/1/nixpkgs/manual.html#sec-language-qt][way to describe Qt packages]].
 
 * Removing the publish cache
+:PROPERTIES:
+:VISIBILITY: folded
+:END:
   Org-publish will not detect files being deleted from the output.  To
   force it to clear its caches, do the following:
   #+BEGIN_SRC elisp
@@ -131,6 +140,9 @@ export XDG_DATA_DIRS=$HOME/.nix-profile/share:$XDG_DATA_DIRS
   #+END_SRC
 
 * Possible colors for the banner
+:PROPERTIES:
+:VISIBILITY: folded
+:END:
   #+BEGIN_SRC css
     background-color: azure;
     background-color: lightcyan;
@@ -138,6 +150,9 @@ export XDG_DATA_DIRS=$HOME/.nix-profile/share:$XDG_DATA_DIRS
   #+END_SRC
 
 * References
+:PROPERTIES:
+:VISIBILITY: folded
+:END:
 ** Org-mode
    - https://orgmode.org/worg/org-tutorials/org-publish-html-tutorial.html
    - https://orgmode.org/manual/Configuration.html#Configuration
@@ -148,6 +163,9 @@ export XDG_DATA_DIRS=$HOME/.nix-profile/share:$XDG_DATA_DIRS
    - https://ogbe.net/blog/blogging_with_org.html
 
 * Local Variables                                                  :noexport:
+:PROPERTIES:
+:VISIBILITY: folded
+:END:
   # Local Variables:
   # eval: (auto-fill-mode)
   # ispell-local-dictionary: "en"