Minecraft wiki entry for Furniture, associated text: Another way to make a computer is by placing a wooden or stone pressure plate. From the outside (or rear of the 'desk'), place a sign on the edge of the pressure plate (check for the black outline showing the plate as selected). This sign can be decorated with common logos, like real monitors. Now, move to the front of the 'desk' (or back of the sign, which is now floating) and place a picture. An optional button can be placed on the left or right as a mouse. Two of these screens can be setup (the pressure plate is required to hold the sign) for dual monitor configurations.