U Con Umlaut. 1 Press the Alt key on your keyboard and do not let go. I caratteri ä ö ü e ß. The Curse Of The Diaeresis The New Yorker from www.newyorker.com To get the u umlaut sign using the alt code. See instructions here. AltGr then u will. For ß you need to press CTRL ALT S together. 1 Press the Alt key on your keyboard and do not let go. Activate the compose key. Check out the official app httpappl. 30 rows O umlaut.