I know, but can't figure out how to make a capital A Umlaut!
There are buttons for the special characters below the text box. If you're using Windows you can enable the international keyboard and use that as well.
On a Mac it is alt+u then shift+a
Rosetta Stone maps the umlaut vowels to the buttons just right of the keyboard letters ( ; ' [ ] - , etc.) Is it possible to do this with Duolingo?
The umlat does not work in the A of apple
If you click the down arrow to the left of the "special letters", it will capitalize the letters with the umlat above them.