Click on the link to view a Tutorial on how to setup a Mail Merge Envelope Document and add it to print directly from an account. The following things are shown in the demo.
https://jlssolutions.com/QA/PlayVideoN.php?VideoURL=https://jlssolutions.com/KB/images/MailMergEnv.mp4
1 (00:00) Introduction
2 (00:18) Creating Envelope Document in Mail Merge
3 (01:54) Using Saved Document in Mail Merge
4 (02:11) Adding Mail Merge Document to Print Menu