diff --git a/vimrc b/vimrc
index a88a43a..9222eb2 100644
--- a/vimrc
+++ b/vimrc
@@ -250,6 +250,21 @@ function! HLNext (blinktime)
   redraw
 endfunction
 
+" Zoom / Restore window.
+function! s:ZoomToggle() abort
+    if exists('t:zoomed') && t:zoomed
+        execute t:zoom_winrestcmd
+        let t:zoomed = 0
+    else
+        let t:zoom_winrestcmd = winrestcmd()
+        resize
+        vertical resize
+        let t:zoomed = 1
+    endif
+endfunction
+command! ZoomToggle call s:ZoomToggle()
+nnoremap <silent> <C-w>z :ZoomToggle<CR>
+
 " Set special case colors
 function! SetColors()
   highlight CursorLine cterm=NONE ctermbg=234