Provided is a new framework to perform zoom processing of a screen displayed on a display by unit of a simple operation. A zoom processing device of this invention, includes: calculates a movement amount of a pointer which is selecting an object on the screen; and performs enlarged display of the screen including the object at a first magnification when, as a result of the calculation, the movement amount of the pointer is equal to or less than a threshold value, and performs reduced display of the screen including the object at a second magnification when, as a result of the calculation, the movement amount of the pointer is greater than a threshold value.