Instead of using boring text signatures, you can use HTML - formatted signatures ... click the "Look In" drop-down box, and then click the "User Templates in File System" option.

then the HTML/Javascript gadget may be more suitable than a text box one. To remove a text box gadget from the layout template, click the small "Edit" link in the lower right corner, then click ...

I’ll show you how to use the Content Control tools within Microsoft Word to create templates that you ... Click that text, and a drop-down box will appear with the words in your list.