Generate a derivative on the fly with a transformation (such as cropping, scaling, filling) applied to it. More information about this feature can be found in our Knowledge Base item. Image operations can be passed as io parameters in the form of transform:{operation},{param1}:{value1},{param2}:{value2},.... It's possible to specify several operations: ?io={operation1}&io={operation2}&.... The operations will be applied in the same order they are passed in the url. These are the possible image operations and their parameters: