Jigs are Revit detail families.
hatch22 will look for lines within found families that have the 'hatch22 - Jig Path' line style.
It will also look for primitive regions.
The fill style of a family can be overridden on. Currently that can only be done using 'By Element'.
The override style must be a qualifying primitive fill style.
The detail item family must have a name that starts with 'hatch22 Jig'. e.g. 'hatch22 Jig - Escher Lizard'