New emails can easily be added to the sequence series. You can then edit these emails whenever your want.
To edit any email, first click on the “Email Sequences” on the left side of the central dashboard.

Then scroll down to the Email Sequences section. Here you can see all the emails that you have added to the sequence.
Click on any particular lead that you wish to edit.

In Edit email content section, you can edit your email easily.

Once you have completed the editing, click on the “Update Details” to save the editing.