map <c-_> :cstag <c-r>=expand("<cword>")<cr><cr>
endif
-" Maps Ctrl-[h,j,k,l] to windows split navigations
-nnoremap <C-h> <C-W><C-H>
-nnoremap <C-j> <C-W><C-J>
-nnoremap <C-k> <C-W><C-K>
-nnoremap <C-l> <C-W><C-L>
-
-"
-" Maps Ctrl-[h,j,k,l] to resizing a window split
-nnoremap <C-H> <C-W><
-nnoremap <C-J> <C-W>-
-nnoremap <C-K> <C-W>+
-nnoremap <C-L> <C-W>>
+" Maps Ctrl-[h,j,k,l,+,-] to windows split navigations and resizing
+nnoremap <C-H> <C-W><C-H>
+nnoremap <C-J> <C-W><C-J>
+nnoremap <C-K> <C-W><C-K>
+nnoremap <C-L> <C-W><C-L>
+if bufwinnr(1)
+nnoremap <Leader>j :exe "resize " . (winheight(0) * 2/3)<CR>
+nnoremap <Leader>k :exe "resize " . (winheight(0) * 3/2)<CR>
+endif
" folding
noremap <space> za