(IMPORTANT: You might need to make a symlink (e.g. in /usr/local/bin) pointing to the command line tool of your external diff tool) Preferences > Package Settings > FileDiffs > Settings - Default Uncomment one of the examples or write your own command to open external diff tool. This command may need to be a full path (e.g. /usr/local/bin/ksdiff), if the command isn't in your PATH. It supports: A

