nnoremap <Leader>9 :9b<CR>
nnoremap <Leader>0 :10b<CR>
+" Make last active window the only window. Similar to <C-w> o.
+nnoremap <C-w>O <C-w>p<C-w>o
+
" Maps to change spell language between English and German and disable spell
" checking.
if v:version >= 700