To Compare Two Items in the Model

To compare two items in the model

1. Hold down CTRL key, and select exactly two items in the scene or in the Selection tree.
2. Click Home tab Tools panel Compare .
3. In the Compare dialog box, the Find Differences In area, select the check boxes for all required options.
   Note: The Overridden Material and Overridden Transform check boxes relate to changing the color and transparency in Autodesk Navisworks, and changing a file's origin, scale or rotation since loading into Autodesk Navisworks, respectively. These check boxes are clear by default. All the other criteria relate to properties of items from the original CAD model.
4. In the Results area, select the check boxes to control how the comparison results are displayed:
   • Save as Selection Sets. Saves the items that you are comparing as a selection set. You can then use this set for later comparisons between the same items.
   • Save Each Difference As Set. Saves the resulting differences found in the comparison between the two items as a selection set for later analysis. The selection set will also have a comment attached detailing the differences in more depth.
   • Remove Old Results.Removes any selection sets resulting from a previous comparison, in order to reduce confusion when looking at the results.
   • Hide Matches. Hides all items that turn out to be the same in the comparison, when the comparison finishes.
   • Highlight Results. Highlights each resulting difference with a color override, when the comparison finishes. You can reset the colors back by clicking Home tab Project panel Reset All drop-down Appearances .
   
5. Click OK.