From your email's manage page you can view overall email statistics, subject line test statistics, view the email's content as well as the raw HTML and send a test in the "View Email" tab, and view the targeting used.
You can add tags to the email with the "Edit Tags" button. Tags don't do anything but categorize your email. You can view the tags on this manage page or in your group's manage page. You can also create a tag when adding tags in this way using the "Add New Tag" button.
Click the "Duplicate This Email" button to make a copy of the email, including content and targeting. Click the "Duplicate With Exclude" button to duplicate the email, exclude the first email from the duplicate, and remove the random limit. (This is useful when doing email testing.) We'll add 'copy of' to the beginning of the administrative title.
If the email hasn't been sent, you can refresh targeting as well by clicking the "Refresh Targeting" button and generate a new count.
If you need to reschedule your email, you can do this by clicking the Reschedule button in the upper right. You'll be able to reschedule the email on the next page.
You can also stop emails mid-send from this page. You can also see what time the email finished sending in the top right.
You can also add this email to an email campaign. You can select an existing email campaign or create a new one. An email can be part of multiple campaigns. More on email campaigns here.
You can also create a ladder where receiving this email is the trigger. Make sure that your email is still in draft when you publish the ladder, since ladders are not retroactive. By default, people will be triggered into the ladder by receiving this email. You can customize the ladder from there. If you've already created a ladder that is triggered by this email, you can click "View Ladder" to see that ladder. The ladder will also be available in your list of ladders.
You can also see if your email is part of an email campaign, and access the campaign at the hyperlink.