- Click on the Pages tab on the right side of the screen.
- Right-click on any of your pages.
- Select Insert Pages...
In the "Insert Pages" screen, you can:
- Select the number of pages you'd like to insert
- Choose where you want to insert those pages
- Choose the master page from which you want the new pages built (only important if you're using multiple master pages)
Note: your page numbers (if you have any) should automatically continue onto the new pages.