Productivity features added in X13 include dynamic help, new CAD block editing, multiple select and edit rooms, save text to the library and editing 3d shapes with union, subtraction and intersection edits.
Features Introduced in X13
5513 - What's New in X13 - Full List
5514 - What's New in X13 - Building Construction
5515 - What's New in X13 - Design
5516 - What's New in X13 - Drafting & Project Management
5517 - What's New in X13 - Presentation
5518 - What's New in X13 - Productivity
