{quote}Could we have a toggle that indicates "No Catalog" when an exhibition has no catalog.{quote}

An exhibition entry can be connected to a publication that is the exhibition catalogue. There are exhibitions that did not rpoduce a catalogue, it is important to researchers to indicate this case specifically, so they know that a catalogue is not missing, because someone forgot to link it, but that the absence is the outcome of research.

A related search feature around catalogues (scans, no scans, no catalogue) would useful as well