Vim folding, auto fold xml, fold, unfold

To allow folds based on syntax add something like the following to your .vimrc:

set foldmethod=syntax
set foldlevelstart=1

let javaScript_fold=1         " JavaScript
let perl_fold=1               " Perl
let php_folding=1             " PHP
let r_syntax_folding=1        " R
let ruby_fold=1               " Ruby
let sh_fold_enabled=1         " sh
let vimsyn_folding='af'       " Vim script
let xml_syntax_folding=1      " XML




zo -- To open a fold block

zc -- To fold a block

zr -- Fold less

zm -- Fold more