Does Apptex Only Work With Custom Lists?

Jan 13, 2016 at 5:11 PM
When using custom lists, the Field Mapping works fine.

But when I use a non-custom list (eg. Asset Library) the Field Mapping for Quick View shows all the fields of content type but there's no image link (at least it's not obvious).

Is Apptex supposed to only work on custom lists? If not, is there any documentation on Field Mappings for non-custom lists like Asset Library or Site Assets?

thanks!
Ken