Field
Description
Rules and Guidelines
Ancestor
Type the name of the file to use as the ancestor, or click the browse button: 
to find it.
Ancestor Label
Type the name you want to appear in the title bar of the Ancestor window.
The default is the filename of the file selected.
Target
Type the name of the file to use as the target or click the browse button: 
to find it.
If the file does not exist, it will be created.
Target Label
Type the name you want to appear in the title bar of the Target window.
The default is the filename of the file selected.
Error Log
Type the name of the file to be used as the error log for the merge tool, or click the browse button: 
to find it.
Derivatives Filename
Filename and path of derivative(s)
Display only.
Derivatives Label
Type the name you want to appear in the Derivative window.
Display only.
Add
Click this button to open a browse dialog to select a file as a derivative and add it to the Derivatives list
Remove
Select a derivative in the Derivatives list and click its button to remove it.
Derivatives Label
Select the derivative in the list and type the name you want to appear in the title bar of its window.