A family of Microsoft word processing software products for creating web, email, and print documents.
Assuming the symbol is one that can be found in the Unicode set to the font you're using (or some other font you have installed), open the Symbol dialog (Insert | Symbols | Symbol | More Symbols...) and find the symbol you want, either in "(normal text)" or some specific font (either a different alphabetic font or a symbol font such as Symbol, Wingdings, Webdings, etc.). When you have the symbol, selected, click Shortcut Key... to open the Customize Keyboard dialog. In the "Press new shortcut key" box, press the keys you want to use to generate the symbol and click Assign.