GN4 supports more titles/typographies in the same database.

Editions, sections, zones, regions, libraries are specified separately for each title.

Formats, fonts, colors, dashes, copyfits, estimates, terminators/ends, image handling are specified separately for each typography, but as the typographies can be shared among the titles, they can be available for more titles without duplicating.

You can open and edit in the same Fred session editions, belonging to different titles, and pages belonging to editions in different titles that belong to the same or different typography.