I have put together new device which has 3-way levers and 4-chains to control the output flow direction. The levers are inside conveyor and it's in difficult place that you cannot see what is the current output status. So i quickly draw these arrow tags to be attached to the pulley chains to indicate which way the levers are turned.

Parts: Right, left and straight arrow tags.

Nothing special in the print settings. Can be easily printed with dual color.