The Filter Tray contains all filter-related templates loaded into the Editor at start-up.  These templates include all out-of-the-box templates installed with the Absyntax framework plus any detected third-party add-ins.

 

Select a template and drag it onto the Filter Builder's design surface in order to start editing a new composite filter.  Or, drag a template onto an existing filter group in order to add a new element to that group.

 

The Filter Tray is shown by selecting View → Filter Tray from the menu bar or by clicking the hyperlink on the Filter Builder's empty design surface.