set nu
set hlsearch
set autoindent
set nobackup
set ruler
set showmode
set bg=light
set cursorline
set cursorcolumn
syntax on
nmap <F2> : set nu<CR>
nmap <F3> : set nonu<CR>
nmap <F4> : set wrap<CR>
nmap <F5> : set nowrap<CR>
nmap <F6> : set hlsearch<CR>
nmap <F7> : set nohlsearch<CR>