When you have set up your envelope the way you want, you can print it, as well as save it so that you can reuse it. What do you want to do? Start Word. Click Options. Click Advanced. Scroll down, and under General, type your return address in the Mailing address box. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.