Sets the page size of the adjustment.
See [method@Gtk.Adjustment.set_lower] about how to compress multiple emissions of the [signal@Gtk.Adjustment::changed] signal when setting multiple adjustment properties.
the new page size
See Implementation
Sets the page size of the adjustment.
See [method@Gtk.Adjustment.set_lower] about how to compress multiple emissions of the [signal@Gtk.Adjustment::changed] signal when setting multiple adjustment properties.