Special Characters – Windows
In Windows, combinations of the ALT key plus a numeric code from the number keypad can be used to type a non-English character in any Windows application.
Windows ALT Codes
- Ä = ALT+0196
 - ä = ALT+0228
 - Ö = ALT+0214
 - ö = ALT+0246
 - Ü = ALT+0220
 - ü = ALT+0252
 - ß = ALT+0223
 - € = ALT+0128
 
Special Characters – Mac
Mac OPTION Codes
- Ä = Option + u, then A
 - ä = Option + u, then a
 - Ö = Option + u, then O
 - ö = Option + u, then o
 - Ü = Option + u, then U
 - ü = Option + u, then u
 - ß = Option + s
 - € = Shift+Option+2