You've made a super-fancy email template and have set some ground rules - which logo will appear, what colors would the buttons be, what font will be used etc. This template is then ready to be used in a set of email campaigns. If you want another template maybe slightly similar for another set of campaigns, you can just copy the existing one with all the settings included - no need to start from scratch.
- Go to the Email app and hover over any template.
- Click on the duplicate button and give the copy a name.
- The copy is then added to the list.
Note: the copy of a template will always be unpublished. You'd need to publish it to be able to use it in campaigns and flows.
That's pretty much it! The template copy will have all the content and settings as the original template, and you can use it separately for a different set of campaigns. Have fun!