Short description of Trace Modeler for UML Sequence Diagrams 1.6: Trace Modeler is an easy to use and smart editor for UML sequence diagrams... Ideal for documenting existing systems and brainstorming new designs... And fast too! It instantly updates the diagram layout, freeing you to focus on the actual content... The look of your diagrams is controlled by style settings and easily changed... Your diagrams are always visually pleasing and structurally correct... It will save you a tremendous amount of time!