Editing diff/merge applications
You can edit diff/merge application options to change the diff or merge application to use when working with specific file types or files with specific extensions.
User options apply only to the current user account logged in to the computer. Some user options may be disabled, which indicates they are set on the server and cannot be changed.
1. Choose Tools > User Options then select the Diff/Merge category.
2. Select a diff/merge setting and click Edit.
The Diff/Merge Settings dialog box opens.
3. Make any changes.
4. Click OK to save the changes.