A printer is provided for printing, onto a surface, an interface of document data and coded data. The document data includes first identity data indicative of an identity associated with a region of the interface. The coded data includes tags each including the first identity data and second identity data defining a relative position of the respective tag. The printer comprises an actuator, a coded data generator configured to generate the coded data based at least partially on the first identity data, and a printing mechanism. The printer is configured to print the interface onto the surface, using the printing mechanism, in response to actuation of the actuator.