I forget EXACTLY what I did, but I DO KNOW that I could never use the
Mailings>Envelope tabs and get the changes to stick. I could alter the frame used to hold address text, but could not make it stick after shutting Word down. My goal was to have more lines in address, and more text per line. I gave up.

I am on Word2013.

But one of the posts had me create a template, and then save in a regular docx file. I then change the name/address/font, etc........ and save as another docx file. It works OK, but I NEVER use the Mailings>Envelope tabs, they suck.

His use of the word "template" is quite misleading, cause, it has nothing to do with a
dot or dotx file.

HTH