How to Change the Default Letter Size on Word Envelope Wizard. When it's time to print envelopes, Microsoft Word provides options to update the font size for the delivery and return address. Word ...

1. In Word, go to the top Menu Bar. Click on “Tools,” then “Letters and Mailings,” then “Envelopes and Labels” and then the “Labels” tab. 2.

For example, if you are facing this issue while printing a mail merge envelope, here’s what to do: First, in MS Word, go to the Mailings tab and click on the Start Mail Merge drop-down option.

Default print settings are portrait mode. Envelopes generally want landscape mode. You have to set your page size and your print orientation which can be checked in the envelope creation box.