...I had a event, the computer with video with millumin and the other person with the table the lights control... (sorry for my english, I'm spanish)... I use webcam seeing the time of the timeline, and the other person see the time with the other laptop for control time and the control lights of the table. And when I active the layer, He don't see the timeline beacause color orange don't have a contrast, and the letters of the time don't see. So I don't use while he use the timeline.