An embodiment of a computer-based method to graphically specify one or more encoder lines at which one or more nozzles of a print head is to release a droplet of an organic material includes:(1) displaying on a display device a graphical pocket representation of a pocket, the graphical pocket representation includes one or more graphical encoder line where the one or more graphical encoder line corresponds to the one or more encoder step of the pocket;(2) receiving a particular graphical encoder line where the received graphical encoder line is a subset of the one or more graphical encoder lines;(3) displaying the graphical droplet at or erasing the graphical droplet from the particular received graphical encoder line; and(4) generating one or more nozzle control values using the one or more received graphical encoder lines where the one or more nozzle control values specifies whether the corresponding nozzle releases the droplet of the organic material.