Hi @t.dumm like several other of the tools described in the network manager guide, that feature is currently only included in a premium plugin available to enterprise clients. In case it’s helpful to know, this feature works by running update_site_option( 'pb_pdf_page_width_default', DESIRED_VALUE ) and update_site_option( 'pb_pdf_page_height_default', DESIRED_VALUE ). These values are then used to set the defaults when new books are created. See pressbooks/class-pdfoptions.php at a4af9d30cdf2933ac087058a61c6d1910be3589b · pressbooks/pressbooks · GitHub