Vim: Fold

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Mode

:set foldmethod=normal
:set fdm=normal

`manual`	Manually define fold range.
`indent`	Automatic make the folds based on indent.
`syntax`	Automatic make the folds based on your file extension.
`expr`	Use `:set foldexpr=TODO`.
`marker`	Manually define fold range and add a marker.
`diff`	vim -d file1 file2 vimdiff file2 file2 :set diffopt=filler,context:0

`zf`{motion}	Define fold using motion. `zfiB`, `zfib`, `zfi[`, `zfj`
{count}zF	Define fold using count. `2zF` = `zfj`= :.,+1fo = `2:fo`
:{range} fo	Define fold using range. `:.,+1fo` = `2zF` = `zfj`
`zd`	Delete fold at the cursor.
`zE`	Delete all fold in the buffer.
`zo`	Reveal fold at the cursor.
`zc`	Close fold at the cursor.
`za`	Toggle reveal/close at the cursor.
`zi`	Turn fold on/off.
`zr`	Unfold (reveal) per-level.
`zm`	Fold (close) per-level.
`zR`	Reveal all folds in the buffer.
`zM`	Close all folds in the buffer.
`zO`	Reveal all folds from cursor’s root.
`zC`	Close folds from cursor’s child to its root. root \|__childA \|__childB When you press `zC` while your cursor at childA it will fold to root. When you reveal root, childA is folded, childB is not.
`zA`	Toggle `zO`/`zC`.
`zk`	Up one fold section.
`zj`	Down one fold section.

In manual mode, when you close the buffer, the fold is gone.

To save the fold the memory, use :mkview. To load from the memory, use :loadview.

To save the fold to a file, use :mkview <filename>. To load the fold from a file, use :loadview <filename>.

:set foldcolumn=0-9
:set fdc=0-9

References: