This diagram shows how pages are added and page and cover templates are chosen. It also shows how the pages and photos panel can be altered in size.
Cover
To see what other cover choices are available highlight the cover in the pages panel (blue outline chosen by clicking on it) and then click the "style" button.
Adding or removing pages
The software will have 20 pages loaded when you open it. More can be added (or removed) up to a maximum of 50 pages by using the small + or - buttons on the top right hand corner of the pages panel. Pointed out here by the "Add pages" arrow. Books with less than 20 pages are not recommended as they are too thin for good binding and so the software will not allow the removal of pages if there are 20 or less.
Changing Panel size
The photo and pages panels can be adjusted in size by sliding the middle bar up or down as shown.