MOBILE TERMINAL DEVICE, STORAGE MEDIUM, AND DISPLAY CONTROL METHOD

A cellular phone includes a display surface; a touch sensor configured to detect an input with respect to the display surface; and a CPU configured to control a display. In the case where a predetermined page of an electronic document is displayed on the display, the CPU updates, while an input is continuously detected by the touch sensor, an amount to be turned when pages of the electronic document are turned, and determines an amount to be turned by which the electronic document is turned based on the updated amount to be turned at a timing when the input is terminated.