When writing large documents with a text editor, it is sometimes useful to zoom out and get a high-level view of the file (I believe Sublime Text has a feature called minimap that does this). This functionality can be added to gVim with a simple vimrc addition (to my knowledge, this will not work with regular Vim).
Add the zoom out command with the following:
noremap <Leader>zo :set guifont=courier_new:h4<CR>
Add the …more ...