On Windows, to make special characters, hold down the Alt key and type in the numbers from the numeric keypad.
On MacOS, the option key functions as a modifier key like the shift key. Hold it down and press another key simultaneously. For option - shift, hold down both the option and shift keys and press another key simultaneously.
| Character | MacOS | Windows | Description |
| À | option - ` A | Alt + 0192 | grave accent |
| Á | option - e A | Alt + 0193 | acute accent |
| Â | option - i A | Alt + 0194 | circumflex accent |
| Ã | option - n A | Alt + 0195 | tilde |
| Ä | option - u A | Alt + 0196 | umlaut |
| Å | option - shift - a | Alt + 0197 | ring |
| Æ | option - shift - ' | Alt + 0198 | AE |
| Ç | option - shift - c | Alt + 0199 | cedilla |
| È | option - ` E | Alt + 0200 | grave accent |
| É | option - e E | Alt + 0201 | acute accent |
| Ê | option - i E | Alt + 0202 | circumflex accent |
| Ë | option - u E | Alt + 0203 | umlaut |
| Ì | option - ` I | Alt + 0204 | grave accent |
| Í | option - e I | Alt + 0205 | acute accent |
| Î | option - i I | Alt + 0206 | circumflex accent |
| Ï | option - u I | Alt + 0207 | umlaut |
| Ð | option - u I | Alt + 0208 | Icelandic |
| Ñ | option - n N | Alt + 0209 | tilde |
| Ò | option - ` O | Alt + 0210 | grave accent |
| Ó | option - e O | Alt + 0211 | acute accent |
| Ô | option - i O | Alt + 0212 | circumflex accent |
| Õ | option - n O | Alt + 0213 | tilde |
| Ö | option - n O | Alt + 0214 | umlaut |
| Ø | option - shift - o | Alt + 0216 | slash |
| Ù | option - ` U | Alt + 0217 | grave accent |
| Ú | option - e U | Alt + 0218 | acute accent |
| Û | option - i U | Alt + 0219 | circumflex accent |
| Ü | option - u U | Alt + 0220 | umlaut |
| Ý | Alt + 0221 | acute accent | |
| Þ | Alt + 0222 | Icelandic | |
| ß | option - s | Alt + 0223 | German |
| à | option - ` a | Alt + 0224 | grave accent |
| á | option - e a | Alt + 0225 | acute accent |
| â | option - i a | Alt + 0226 | circumflex accent |
| ã | option - n a | Alt + 0227 | tilde |
| ä | option - u a | Alt + 0228 | umlaut |
| å | option - a | Alt + 0229 | ring |
| æ | option - ' | Alt + 0230 | ae |
| ç | option - c | Alt + 0231 | cedilla |
| è | option - ` e | Alt + 0232 | grave accent |
| é | option - e e | Alt + 0233 | acute accent |
| ê | option - i e | Alt + 0234 | circumflex accent |
| ë | option - u e | Alt + 0235 | umlaut |
| ì | option - ` i | Alt + 0236 | grave accent |
| í | option - e i | Alt + 0237 | acute accent |
| î | option - i i | Alt + 0238 | circumflex accent |
| ï | option - u i | Alt + 0239 | umlaut |
| ð | Alt + 0240 | Icelandic | |
| ñ | option - n n | Alt + 0241 | tilde |
| ò | option - ` o | Alt + 0242 | grave accent |
| ó | option - e o | Alt + 0243 | acute accent |
| ô | option - i o | Alt + 0244 | circumflex accent |
| õ | option - n o | Alt + 0245 | tilde |
| ö | option - u o | Alt + 0246 | umlaut |
| ÷ | Alt + 0247 | division sign | |
| ø | option - o | Alt + 0248 | slash |
| ù | option - ` u | Alt + 0249 | grave accent |
| ú | option - e u | Alt + 0250 | acute accent |
| û | option - i u | Alt + 0251 | circumflex accent |
| ü | option - u u | Alt + 0252 | umlaut |
| ý | Alt + 0253 | acute accent | |
| þ | Alt + 0254 | Icelandic | |
| ÿ | option - u y | Alt + 0255 | umlaut |