You can view changes made to an assembly, components, or items in the current session. The changes are tracked against a baseline of the model as it was retrieved. Changes to items in the assembly appear with different markups in the View Changes Model Tree. Only design related changes are shown. Changes to simplified representations, environment, appearance, style, and views are not tracked.

The View Changes dialog box shows changes to the component selected before you open the dialog box. When no component is selected, it shows changes to the top-level assembly.