to disable foldcolumn
	    "[1-9]":      to display a fixed number of columns
	See |folding|.

			*'foldenable'* *'fen'* *'nofoldenable'* *'nofen'*
'foldenable' 'fen'	boolean	(default on)
			local to window
	When off, all folds are open.  This option can be used to quickly
	switch between showing all text unfolded and viewing the text with
	folds (including manually opened or closed folds).  It can be toggled
	with the |zi| command.  The 'foldcolumn' will remain blank when
	'foldenable' is off.
	This option is set by commands that create a new fold or close a fold.
	See |folding|.

						*'foldexpr'* *'fde'*
'foldexpr' 'fde'	string	(default "0")
			local to window
	The expression used for when 'foldmethod' is "expr".  It is evaluated
	for each line to obtain its fold level.  The context is set to the
	script where 'foldexpr' was set, script-local items can be accessed.
	See |fold-expr| for the usage.

	The expression will be evaluated in the |sandbox| if set from a
	modeline, see |sandbox-option|.
	This option can't be set from a |modeline| when the 'diff' option is
	on or the 'modelineexpr' option is off.

	It is not allowed to change text or jump to another window while
	evaluating 'foldexpr' |textlock|.

						*'foldignore'* *'fdi'*
'foldignore' 'fdi'	string	(default "#")
			local to window
	Used only when 'foldmethod' is "indent".  Lines starting with
	characters in 'foldignore' will get their fold level from surrounding
	lines.  White space is skipped before checking for this character.
	The default "#" works well for C programs.  See |fold-indent|.

						*'foldlevel'* *'fdl'*
'foldlevel' 'fdl'	number	(default 0)
			local to window
	Sets the fold level: Folds with a higher level will be closed.
	Setting this option to zero will close all folds.  Higher numbers will
	close fewer folds.
	This option is set by commands like |zm|, |zM| and |zR|.
	See |fold-foldlevel|.

					*'foldlevelstart'* *'fdls'*
'foldlevelstart' 'fdls'	number	(default -1)
			global
	Sets 'foldlevel' when starting to edit another buffer in a window.
	Useful to always start editing with all folds closed (value zero),
	some folds closed (one) or no folds closed (99).
	This is done before reading any modeline, thus a setting in a modeline
	overrules this option.  Starting to edit a file for |diff-mode| also
	ignores this option and closes all folds.
	It is also done before BufReadPre autocommands, to allow an autocmd to
	overrule the 'foldlevel' value for specific files.
	When the value is negative, it is not used.

					*'foldmarker'* *'fmr'* *E536*
'foldmarker' 'fmr'	string	(default "{{{,}}}")
			local to window
	The start and end marker used when 'foldmethod' is "marker".  There
	must be one comma, which separates the start and end marker.  The
	marker is a literal string (a regular expression would be too slow).
	See |fold-marker|.

						*'foldmethod'* *'fdm'*
'foldmethod' 'fdm'	string	(default "manual")
			local to window
	The kind of folding used for the current window.  Possible values:
	|fold-manual|	manual	    Folds are created manually.
	|fold-indent|	indent	    Lines with equal indent form a fold.
	|fold-expr|	expr	    'foldexpr' gives the fold level of a line.
	|fold-marker|	marker	    Markers are used to specify folds.
	|fold-syntax|	syntax	    Syntax highlighting items specify folds.
	|fold-diff|	diff	    Fold text that is not changed.

						*'foldminlines'* *'fml'*
'foldminlines' 'fml'	number	(default 1)
			local to window
	Sets the number of screen lines above which a fold can be displayed
	closed.  Also for manually closed folds.  With the default value of
	one a fold can only be closed if it takes up two or more screen lines.
	Set to zero to be able to close folds of just one screen line.
	Note that this only has an effect on what is displayed.  After using
	"zc" to close a fold, which is displayed open because it's smaller
	than 'foldminlines', a following "zc" may close a containing fold.

						*'foldnestmax'* *'fdn'*
'foldnestmax'