How to add em-dashes and similar special characters?

Hi, I have a laptop without a numeric keypad. Is there any way to use Text Blaze to insert a special character? Normally, if I have a numeric keypad, I can type Alt 0151 and get an em-dash. I thought there might be a way to insert a special character in Text Blaze, then just type "/em" to get an em dash. Any ideas? Feel like I'm going around in circles.

You can include an em dash or other special characters in your snippet and then insert your snippet.