Common configuration for processing machines
Colors on the right determine side to machine slot association. You can click on them to configure which slot the corresponding side associates. Shift-clicking cycles the colors backwards. In the GUI middle button is the front of the machine and bottom-left button is the back of the machine. Side colors can be also seen on the machine while holding the Configurator.
Outputted items can be "painted" by clicking the middle slot. "Painted" items can be used for sorting in logistical transporters or filtering machine inputs.
Colors on the left can be used for input filtering (TODO...)