To show the differences between the file in the project and the version checked into source control, do the following:

1. In the Project Explorer, right-click the file.
2. From the shortcut menu, choose Source Control > Show Differences.

You can use an external diff tool in preference to the built-in SEGGER Embedded Studio diff tool. To define the diff command line SEGGER Embedded Studio generates, choose Tools > Options > Source Control > Diff Command Line. The command line is defined as a list of strings to avoid problems with spaces in arguments. The diff command line can contain the following macros:

• $(localfile):  The filename of the file in the project.
• $(remotefile):  The filename of the latest version of the file in source control.
• $(localname):  A display name for $(localfile).
• $(remotename):  A display name for $(remotefile).