I am using Multisim 10.0.343 at the College where I work. We have some simple logic boards that are used to teach fault finding principles in digital circuits. These boards simulate a set of Traffic Lights which run through the sequence of Red, Red&Amber, Green, Amber, Red. In order to assist the teaching I have drawn the circuit in Multisim, placing LED diodes at various points in the circuit to indicate the logic levels present as the sequence is stepped through. To make the circuit appear less complicated, I have tried to 'hide' the ground connections and the limiting resistors for my LED indicators by turning their colours to light grey, I have also coloured the wires and associated logic gates for the red LED, amber LED and Green LED red, amber and green, showing the path that is taken to illuminate the relevant traffic light.
My problem is that after I save the circuit when I re-open it, all the component colours have been lost, the wires remain correctly coloured, but the logic gates and the limiting resistors revert back to their original blue rather than the light grey, red, amber and green that I selected.
