How to reuse a previously created email design
You can reuse your past campaigns and active automated emails as a base for your new emails.
Whether you're setting up a campaign or an automated email, when creating your email, go through the first setup step and click the "Save & next" button.
On the next screen, you can choose the starting point for your email. Search for the Past emails section on the left-side panel and click on the Campaigns or Automations option to view your past designs.
Click on the campaign or automated email you'd like to use, and you'll be able to modify it in the editor.
If you've created a template or saved your past campaigns as templates, you'll also find them in the Templates —> Yours section.