The present invention concerns a new category of integrated circuitry and a new methodology for adaptive or reconfigurable computing. The image display apparatus has a candidate information obtaining unit, a selection screen display unit, a presentation execution instruction unit, and a drawing screen display unit. The counterbalance mechanism can include: a wheel; a gas spring having a cylinder and a moveable piston; a wheel moveably connected to the gas spring; and the tension member is connected to the leg assembly.