To create viewbook pages:
1. Enter the Viewbook Builder (just click Content from the menu at the top and click Viewbook)
2. Click + next to Your Pages on the right.
3. Name the page in the Label section.
4. Pick the asset type that you want the page to be linked up with in the Assets section.
5. Pick a template for the page.
6. Click Submit.
7. Your assets must be published for them to show up in the viewbook.