This plugin allows the visitor to non-destructively manipulate pictures using new buttons on displayimage.php. Depending on the plugin configuration, the settings for each picture may be saved in a cookie on the visitor's computer (so if a picture is visited again, the old settings will be applied), and the URL may change accordingly (so if the visitor passes on the link, the recepient will see the pic just as the visitor likes it). Check the demo to see what all this means. The plugin will add ~30 kbyte of javascript to the page (slightly less in compatible mode).