Open all folds

zi


Close all folds

zM


vimrc  for folds

"folding method
"set foldmethod=indent
set foldmethod=syntax

"set fold color
hi Folded ctermfg=darkgrey

"indent folds to same has children
set foldtext=MyFoldText()
function! MyFoldText()
    let n = v:foldend - v:foldstart + 1
    let i = indent(v:foldstart) 
    let istr = '' 
    while i > 0 
        let istr = istr . ' '
        let i = i - 1 
    endwhile  
    return istr . "+-" . v:folddashes . " " . n . " lines "
endfunction

"use F9 to open/close folds
inoremap <F9> <C-O>za
nnoremap <F9> za
onoremap <F9> <C-C>za
vnoremap <F9> zf

"auto save and auto load folds
autocmd BufWinLeave *.* mkview 
autocmd BufWinEnter *.* silent loadview