A gallery-style section (so that there are visuals) within the artwork entry to display and link to related works within the catalogue would be fantastic, and has been suggested by a number of our colleagues. There is currently no way to link related works (for example, a final work with all its preparatory works) except through Notes, which doesn't allow for a preview of the image and requires a lot of manual inputting. See for example the Rothko catalogue hosted by the NGA: