I’ll confess I find neither DisplayedAttributes or ExposedAttributes any more obvious than KeyAttributes, both suggestions give me the connotation of something visible. My first thought would be that this is something I can see, perhaps in Map View. One option is to make it more abstract such as FavoriteAttributes, which suggests it is user-specific and perhaps not integral to the data structure. The other option is to be more precise, like TextPaneEditorAttributes.