Terminal having function for controlling screen size and program recording medium

A terminal with a screen size controlling function and a medium with a program to execute the function are provided to controls the screen size freely by enlarging a part of the screen displayed on a touch screen or reducing the screen on the touch screen to correspond to a region setting operation of the touch screen. A terminal sets up a region corresponding to a touch operation of a user for a touch screen(S610). The region is an internal area of a closed curve on the touch screen. When one point on a touch screen is touched, the terminal recognizes an inner region of a circle with a predetermined radius around the touched one point as the set region. The terminal enlarges a part of the screen displayed on the touch screen to correspond to a region setting operation(S620). The terminal displays a part of the enlarged portion of the screens displayed in the touch screen(S630).