notes for Search and replace umlaute with a shortcut in VIM:
copy this in .gvimrc
map <F4> :s/ae/ä/g\|'<,'>s/oe/ö/g\|'<,'>s/ue/ü/g<CR><CR>
usage
v to select text, then press f4 example: But you'll have to escape it in the map command :map <F3> :%s!<!\<!g\|:%s!>!\>!g<CR>