Use this option to combine pages that could work well together and minimise the number of pages in a story.
Select the template to open the Options menu and then select Combine With.
Next, select the second page that you are combining the first one with.
Use this option to undo / break apart combined pages.
Use this option to switch the order of the combined pages.
Combined Page Width
Select the arrow icon separating the pages to modify layout: Equal Width (each page has an equal width, Narrow Left (left page is narrower than the right, or Narrow Right (right page is narrower than the left).