Thank you for reaching out in the Community! I'm happy to help. If your email campaign is showing reporting, this means the email has been sent and cannot be edited. If you need to edit the email again to send it, you can copy it. To do this you you will go out to your campaigns page, select the more button next your campaign, and select copy. You will then be prompted to rename your email campaign. You must choose a unique campaign name. From there, you will have full editing ability with your email.
Please feel free to reach out if this does not resolve you concern.