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.
- Download and install KDiff from the following location:
http://kdiff3.sourceforge.net/
- Download the plugin file from the following location:
http://externaldiff.sourceforge.net/
- Select
Window > Preferences
to configure the tool.
- Type `compare' as the filter text and select
Compare/External Tool
panel.
- Browse to the location where KDiff is installed and select
kdiff.exe
.
- Click
OK
.
- Select the files you want to compare using KDiff.
- Right click and select
Compare With > Each Other (external tool)
.
The result of comparison appears in the KDiff editor.