- Folds allow one to hide away parts of the code, so they won't interfere with the code flow.
- One can set up a fold using zf[movement].
- One can open a fold using zo.
- zc closes a fold again.
- zO opens all folds and sub-folds recursively.
- The :[Range]fold (or :[Range]fo) acts like zf.
- zE eliminates all folds in the window.
- zi toggles folding on and off.
- For more information see :h fold.txt