If you're already editing your campaign, you can review your campaign summary by clicking on the Send step in the top right of the screen.
If you've closed your campaign, then select Campaigns from the navigation bar and your campaigns list is displayed.
Click on the Summary icon alongside the appropriate campaign to display your campaign summary.
This screen provides a summary of the campaign selected including your campaign details, HTML size, word count, image sizes and links within both the HTML and plain text versions of your campaign, and, finally, details about your testing.
Use the Edit icon alongside the appropriate section to make any changes.