Pinker allows you to save any combination of filter settings and expressions in the search field under a name, effectively creating shortcuts to sets of files that you would like to access repeatedly. Each  time a search is saved under a name, it gets added to the Saved searches list.

Clicking the star button brings up the confirmation menu. In this example, “United bookings” is entered as a name. Pressing “OK” adds the name to the Saved searches list
Left-click on Saved searches switches to the saved searches panel, highlighting the currently active Saved search