Extending image style effects
Earlier in this chapter we've seen how basic image effects can be applied to pictures that users upload. We will introduce a new module now that will help us in further extending the effects pool available for users on a Drupal website.
The module in question is called ImageCache Actions, which originates from earlier Drupal versions where this functionality was referred to as ImageCache. Proceed to download (http://drupal.org/project/imagecache_actions) and install it. Notice that this module comes bundled with a bunch of other modules that should be enabled too: ImageCache Canvas Actions and ImageCache Color Actions.
You may wonder what's the point in adding image effects? What is there to it? I'll then remind ...