Show Component Change History
Step 1
Change history for a component can be viewed by right-clicking on the component in either the component library or an open Bill of Materials (BOM) and selecting the show component history option.
Step 2
Change history for the component is shown in the top of the history navigator. To view the differences between a previous version and the latest version of the component, select the previous version in the change history list to populate the component compare window at the bottom of the navigator.