Default Sort
This setting appears under VPS: Lister Settings. It is specific to ProcessWire's Lister and is an optional setting that applies to both Modal Thumbs view and Modal Lister view.
If you need to specify a default sort for Lister results of found selectable pages, use this setting. You would specify a property or field value to sort results by, for instance, -modified, to sort by modified, descending. The default is to sort by title.