There is provided an information processing apparatus including a position detection unit for detecting a contact position of an operating tool which has contacted a screen, an area size detection unit for detecting a contact area size of the operating tool which has contacted the screen, a pressure detection unit for detecting a pressure of the operating tool pressing the screen, and a parameter setting unit for setting, according to the contact area size of the operating tool on an object for parameter setting displayed on the screen and the pressure of the operating tool pressing the object, a size of a parameter associated with the object.