The main thing you need to know about this module, is that information is located not in the page templates, but separately.
When editing/creating a page, you will see a “Page content” field. The main part of your page is located here. (Its content).
You may customize it the way you want, change its outlook, upload images and display them.
The number of such pages is not limited. You can manage them from the site directly.
Design of all the pages can be customized in the “Site pages” template.
Please, ask all of your Page Editor related question here!.