Makes @default_page_setup the default page setup for @op.
This page setup will be used by gtk_print_operation_run(), but it can be overridden on a per-page basis by connecting to the #GtkPrintOperation::request-page-setup signal.
a #GtkPageSetup, or %NULL
2.10
See Implementation
Makes @default_page_setup the default page setup for @op.
This page setup will be used by gtk_print_operation_run(), but it can be overridden on a per-page basis by connecting to the #GtkPrintOperation::request-page-setup signal.