Hi Frank, most likely you can find a user manual for your printer on Canon's support site here: https://www.usa.canon.com/internet/portal/us/home/support/ That should explain the steps to scan the document ''to your computer.'' For example, to save the scan into your Documents folder. Then in Firefox, while you are composing a new message, you should be able to use your email site's attach button to grab that file and attach it to your message. Maybe Canon's software has a shortcut for that, but I would have no idea myself.