Select items from an EasyCatalog panel prior to dragging from a library flagged as ‘EasyCatalog Library’

This is displayed when dragging an item to the page if you have the ‘EasyCatalog Library’ option checked (this is located on the library’s pop out menu) and have not selected a group or record in the panel.

Having this option checked allows you to select a record or group, drag to document and have the library item populate automatically.
EasyCatalog Library Check Option