If you hold down either "ALT" button, using your numeric keypad, press any number or set of numbers, then release the ALT button to see the character produced. The character may vary according to where the character is outputed. If you are using a word processor you might get a different character as opposed to using a graphics program that outputs text. However, there are standard sets of
. characters, depending on the language and enviroment of your system. There is a website, conveniently named, http://www.alt-codes.net/, that lists all of the different character sets and has a complete list of alt codes.