Right-click the request containing the related item and select Related. The request opens with the Related tab active.
Right-click the item that you want to action and select Compare. The Compare Items dialog appears.
Select one of the following options:
Another revision: select a different revision of the item that is related to the request. If only one revision is related to the request, this option is unavailable.
A workfile: select a file to compare with the item. Type the full path and filename, or click the Browse button to find a file.
Another item: select a different item to compare with the item. Type the item specification, or click the Browse button and select an item from the Select Object list. The item specification has the following format:
productID:itemID. partVariant-itemType; revision
To enable item header substitution, select the Expand substitution variables check box.
Click OK. The default merge tool opens where you can compare differences between the items.