Performance was enhanced for vertical justification, balanced columns, and span columns, reducing the "lag" when typing in complex layouts.
A new automated feature in the Text Frame Options that allows you to add vertical lines (rules) between columns of text without drawing them manually. Adobe InDesign 2020
Upon launching InDesign 2020, users were greeted with a new Home screen. While previous versions showed a blank slate or a basic "New Document" dialog, the 2020 Home screen became a dashboard. It displayed recent files, quick-access tutorials, and a better-organized "New Document" dialog that made setting up bleed, margins, and intent (Print, Web, Mobile) more intuitive. Performance was enhanced for vertical justification