First go to Engage -> Sequence. Click on the three horizontal dots on the right on the email sequence and click "Edit."
Once you click “Edit,” it will take you to the 1st touch, “Follow-up 1," and so forth. You can add new follow up by selecting "Add New Follow-Up Email" on the left side or by selecting it when scrolling all the way down past your last email in the sequence.
Here you can add up to 10 emails in an email sequence. Once you have made additions, click "Save Sequence" on the bottom left.
Please reach out to [email protected] or directly contact your Customer Success Manager for more training on this topic.