Static content in emails
I am trying to work out how to create a new dynamic newsletter - I have created the segments and snippets needed but I can't work out how I add the static content to the email in order to drag them into the segments.
In the print screen below you can see that the static content only has 'section 1' which contains the whole body of the email. How would I break this up into multiple sections (to have section 2, 3, 4 etc.) in order to drag and drop them into the dynamic content?

Thanks!