Use this dialog box to compare two items in the Serena Merge Tool.
| 
   Field  | 
  
   Description  | 
  
   Rules and Guidelines  | 
| 
   Item specification  | 
  
   The specification of the selected item.  | 
  
   
  | 
| 
   Another revision  | 
  
   Select a different revision of the same item.  | 
  
   
  | 
| 
   A workfile  | 
  
   Select a file on disk 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 to find an item.  | 
  
   The item specification has the following format: productID:itemID. partVariant-itemType; revision  | 
| 
   Expand substitution variables  | 
  
   Select to enable item header substitution.  | 
  
   For more information, see About Using Header Substitution Variables.  | 
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