Once you've exported your documents, you can click on Manual Exports to be taken to Export Settings. This section allows you to pick transformations and destination-specific options for your content.
Under Links, you'll find three options:
Apply "no follow" attribute to all links
This will add a rel=nofollow tag to each link in your document
Open Links in New Tab
This will help keep people reading your content by opening all links in a new tab
Replace Embeddable Links (beta feature)
This will automatically format and publish all third-party hosted video, audio and images
