A computer accessory device configured to communicate with a computer includes a two-dimensional sensor array configured to generate image data as the device is moved over a surface. A toner image is formed on an image bearing body. Related user interfaces, application programming interfaces, applications, and systems are disclosed. A thickness Tc of the cover 10 is less than 0. The coating contains one or more pigments whose colors correspond to the primary colors. In this manner, a film of the release agent is formed in a predetermined film thickness on the treatment surface of the template.