OsmAnd: Show only POIs from my OBF file

I have created an OBF file (OsmAnd POIs), and would like to display its POIs.

PROBLEM: When I enable POI display, tons of orange circles make the map unreadable. 99.9% of these POIs are not from my OBF file, they are from the base OSM map.

QUESTION: How can I show only the POIs from my OBF file?

I can modify the OBF file if needed, for instance adding attributes or changing POI type if needed.

In the layers settings I see a "Create POI filter" dialog with a "User defined" item, might it be part of the solution?