How can I reuse a campaign in an automation?

You can reuse any campaign in an automation. To do so:

1. Click Automations on the left menu.
2. Edit or create a new automation. 
3. Click the node (+) where you would like to send an email in your automation.
4. Click the "Sending" tab and select the "Send an email" option from the "Add an action" modal window.
5. On the next screen choose "Start from an existing email."
6. Scroll through the list of past campaigns, or choose from the emails featured in your current automation, then click the one you want to use. You can also use the search field to locate a specific campaign. 
7. Click the "Create" button. 
8. In the next modal, you can choose to edit the email's design and update the required fields. 
9. Click "Save."