PS6 is very similar to PS5 except that in this case we are adding noise. In this system there are two modes, "edit alphabet" and "use alphabet". You can edit the alphabet by clicking on one of the circles which define a letter. Note that the placement of circles is now constrained to a grid, as opposed to the free placement of the PS5 solution. Click "use alphabet" to enter text. Type in some text. One definition of noise is an external disturbance. Here one can add the effect of a shadow to the text by clicking and dragging the mouse.