Well, the title says it all 🙂
You can duplicate a Template by
- creating new, choose "drag & drop editor" and then choose source with button "FROM"
You can duplicate a Campaign by
- ticking the newsletter. Then appears a dropdown allowing to Duplicate
(gosh, it took me 15 minutes to figure out how to do it in the interface since there is no Duplicate button / menu / hint)
But now that my Newsletter/Campaign has its final look after many iterations of little improvements with the Author, I wanted to make it a Template... but I could not find any way to achieve that.
Note: It was possible with Acymailing5.