Is there a possibility to save a Publisher-document as a template like "dotx" or "indt"?
On a Mac, it looks like the Stationery Pad feature still works. That's been in existence since Noah was a boy though, for myself, I've rarely used it.
File > Get Info > tick Stationery pad checkbox
What should then happen is when you double-click on the template document in the Finder, the Finder makes a copy and opens that instead. (To modify the stationery pad document, either turn off the checkbox and edit as usual - or go into your app and select File > Open and select i