Information processing device and control method

An information processing device comprising:

• a foldable one display;
• a memory which stores at least a program;
• and
• a processor which executes the program stored in the memory,
• wherein, by executing the program stored in the memory, the processor performs:
• display mode switching processing to switch between a first display mode in which display of a screen area of the display is controlled as one display area, and a second display mode in which the screen area of the display is split into two display areas of a first display area and a second display area to control the display;
• information holding processing to hold window information about position and size, in the screen area, of a window of each application running in the first display mode;
• and
• display control processing to display the window of the running application in the screen area with the position and size based on the window information held by the information holding processing when switching from the second display mode to the first display mode is done again after switching from the first display mode to the second display mode by the display mode switching processing,
• when switching from the second display mode to the first display mode is done by the display mode switching processing, the processor displays, in an entire screen area of the first display, an active window among windows of running applications in the screen area by the display control processing, and when inactive windows other than the active window are displayed in the screen area, the processor displays the inactive windows with positions and sizes based on the window information held by the information holding processing.