Is there a way to compare files that are not in project?

To compare files that are not in a project, you need to use an external diff tool, for example KDiff, which is an open source tool.

  1. Download and install KDiff from the following location:

    http://kdiff3.sourceforge.net/

  2. Download the plugin file from the following location:

    http://externaldiff.sourceforge.net/

  3. Select Window > Preferences to configure the tool.
  4. Type `compare' as the filter text and select Compare/External Tool panel.
  5. Browse to the location where KDiff is installed and select kdiff.exe .
  6. Click OK .
  7. Select the files you want to compare using KDiff.
  8. Right click and select Compare With > Each Other (external tool) .

The result of comparison appears in the KDiff editor.