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It is best to review the changes that you have made in a file before you check in the file. Your source-code control system displays the differences between your local version of the file and the master version in your source-code control project.
To view your changes
Note You can select only a single file, which must already be checked out. This method reports only the differences between this version and the master version. You cannot use this method to examine differences between two files in your project, for instance.
Your source-code control system displays the differences, or reports that the files are identical.