Presents a page setup dialog for platforms which don’t provide a native page setup dialog, like Unix.
<picture> <source srcset="pagesetupdialog-dark.png" media="(prefers-color-scheme: dark)"> <img alt="An example GtkPageSetupUnixDialog" src="pagesetupdialog.png"> </picture>
It can be used very much like any other GTK dialog, at the cost of the portability offered by the high-level printing API in [ class@Gtk.PrintOperation].
`GtkPageSetupUnixDialog` has a single CSS node with the name `window` and style class `.pagesetup`.