To View Changes to an Assembly
1. Click Tools > Investigate > View Changes or right-click the top-level assembly or a component in the assembly, and choose View Changes. The View Changes dialog box opens.
Changes are marked according to the Legend in the View Changes Tree and preview window.
2. Move the pointer over a changed item in the Model Tree to display information on the changes.
3. Select an item in the View Changes Model Tree to highlight it in the preview window.