Information processing apparatus and display control method

An information processing apparatus comprising:

• a position detection unit configured to detect a position of a plurality of operating tools that are made to contact a surface of a display unit or brought into proximity thereof;
• a reference position determination unit configured to determine as a reference position a position of a first operating tool of the plurality of operating tools that is detected to be contacting the display unit or to be within proximity thereof;
• a display change operation specifying unit configured to specify, according to a moving direction of a position of a second operating tool of the plurality of operating tools that is detected to be contacting the surface of the display unit or to be within proximity thereof simultaneous with the detection of the first operating tool, a specific display change operation associated with the moving direction;
• an operation amount determination unit configured to determine, according to a movement amount of the detected second operating tool, a specified operation amount associated with the display change operation;
• and
• a display control unit configured to perform on an object which is displayed on the display unit the display change operation specified by the display change operation specifying unit with the reference position determined by the reference position determination unit as a reference,
• wherein the display control unit includes
• a reference indicator display unit for making the display unit display, when the reference position is determined by the reference position determination unit, a reference indicator indicating the reference position;
• and
• a change indicator display unit for making the display unit display, when the specific display change operation is specified by the display change operation specifying unit, at least one change indicator indicating a type of the specific display change operation or a change amount by the specific display change operation.