1. A display apparatus comprising: an image display section that displays image on a display screen; a touch location detection section that detects a touch location of a finger of an operator on the display screen; a transfer length calculation section that calculates a transfer length from a touch start point to a touch end point of the finger of the operator that moves while touching the display screen, based on a detection result of the touch location detection section; a transfer length judgment section that judges whether or not the transfer length calculated by the transfer length calculation section is greater than a predetermined reference transfer length; a location shift calculation section that calculates a shift of the finger of the operator in location with respect to a straight track line from the touch start point to the touch end point, based on the detection result in the touch location detection section; a location shift judgment section that judges whether or not the location shift calculated by the location shift calculation section is less than a predetermined reference location shift; and a screen split control section that controls an operation of the image display section so that the display screen is split when the transfer length judgment section judges that the transfer length is greater than the reference transfer length and the location shift judgment section judges that the location shift is less than the reference location shift.