dragFilter makes the button draggable and carries every tiddler the filter returns, where dragTiddler carries a single title.

The drop target chooses how it receives that payload:

• actions runs once per dragged tiddler, with the title in <<actionTiddler>>
• listActions runs once for the whole payload, with all titles in <<actionTiddlerList>>

This test case carries four payload tiddlers tagged Concepts. The button drags all four, so the drop area shows the whole list at once. Drag and drop needs a desktop browser.