Printable publications also have a couple of extra settings in comparison to the standard project settings of a publication. These extra settings will affect how the final PDF version will look like. You can find them when you access the projects settings via the page overview of your Printable Publication.
PDF Margin is the setting to whether you would like to have white space (or negative space) around the content of your pages. The setting margin places a white space around all of the pages of your publication. So if you want to cut the pages into the correct shape and sizes then these white space can be helpful to know when the page starts and ends. Toggle the button on or off to (de)active the PDF margins in your publication.
The setting Page Numbers adds the number of the current page out of the entire number of pages in the publication in the margin. It also adds the name of the publication to the margin. These settings are for the entire publication.When you are previewing the publication in print view with both settings on, you will see white space around the pages along with its page number and title. Toggle the button on or off to (de)active the page numbers in your publication.