How to add or remove a page
To add or remove a page within the layout, please click "Edit pages/design" at bottom left-hand corner of the Editor.
Once you click this, the column on the right side of the Editor will change to support changes of font and color options (if available for that design) as well as adding/hiding pages. For example, in the below screenshot, the pages with the eye icon are currently hidden. To add a page to the layout, you simply want to click that eye icon to add the page to active pages. Remember to "Save pages" and you will be all set!