Codes for Short and Long Vowels in Latin

To insert the characters using a Windows keyboard on a system running the Microsoft Windows operating system, type the numeric code and then hit Alt-x, i.e., hit the "Alt" and "x" keys simultaneously, after entering the numeric code. The numbers are hexadecimal numbers, so "A" through "F" represent the numbers 10 through 15; you can use either lowercase or uppercase letters. You needed to have a space before the number you enter, though, otherwise if you attempt to put "ē" in "fēmina," by typing "f" with "0113" immediately after it, the "f0113" will be replaced with a small box with a question mark within it. So place a space after the "f," type 0113, hit Alt-x, then when ē appears, remove the space before it. Also note that though Microsoft Word supports this method of entering vowels with a diacritic mark in a document not all Microsoft Office applications allow you to enter Unicode characters by this method. E.g., for Microsoft Powerpoint, you will need to use the Character Map method of entering such characters, instead.

References:

1. Unicode Characters
   Graphemica
   
2. Insert ASCII or Unicode Latin-based symbols and characters
   Microsoft Office Support