set gui=nonavigation
let mapleader = ","

noremap d <C-d>
noremap e <C-u>
noremap <S-j> <C-p>
noremap <S-k> <c-n>
noremap x d
noremap <BS> <C-o>

noremap <leader>f <F12>

noremap <leader>nn :set gui=nonavigation<CR>
noremap <leader>n :set gui=navigation<CR>