PreviewChanges Recipe

The PreviewChanges recipe lets you see which lines changed before you save a page when you're editing. From the recipe's page:

Installation

All you need to do is put the script in the cookbook/ directory.

You can do it from the command line like this:

#starting from the document root
cd site/cookbook
wget http://www.pmwiki.org/pmwiki/uploads/Cookbook/previewchanges.php

The pre-configured config.php configuration file will detect that the recipe file is installed and load it automatically. For other similar recipes, you would need to edit you config.php configuration script to cause the script to load.