These examples make use of the Days of the Week tiddler.

To toggle a tag in a tiddler:

<$action-listops  $tiddler="target" $tags="+[toggle[done]]" />

To toggle a title in a field:

<$action-listops $tiddler="target" $field="my-field" $subfilter="+[toggle[done]]" />

To toggle between a value pair:

<$action-listops $tiddler="target" $field="my-field" $subfilter="+[toggle[todo],[done]]" />