Abstract: Electronic printing data is received. The electronic printing data is adapted for a electromechanical print engine of a printing device to form images corresponding to the electronic printing data on physical media. One or more electronic image files are generated from and corresponding to the electronic printing data. The electronic image files mimic physical output of the electronic printing data as images on physical media by the electromechanical print engine. One or more features are added to the images of the electronic image files. The features are added to assist testing and/or verification of one or more of generation of a print job from which the electronic printing data is generated, generation of the electronic printing data from the print job, generation of the electronic image files, and formation of the images corresponding to the electronic printing data on physical media by the electromechanical print engine.