Add Fold A Visual Selection And Expand It Back as a vim til

vim/fold-a-visual-selection-and-expand-it-back.md

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+# Fold A Visual Selection And Expand It Back
+
+If I visually select a series of lines -- say the open and close tags of a
+large `div` in an HTML file I am reading through -- and then hit `zf`, it
+will be _folded_ into a single line. That line will list how many lines are
+included in the fold as well as the content of the first line of the fold.
+
+If I later come back to that fold and want to expand it again, I can hit
+`zd` to delete (or undo) the fold.
+
+To do this, you'll want to make sure your `foldmethod` is set to `manual`.
+This can be done by running the following command:
+
+```
+:set foldmethod=manual
+```
+
+See the vim helpfiles (`:h fold`) for more details.