Today I purchased a Kensington universal Multi Display adapter, to use with my edge. If I am well informed, I must be able to use an extra monitor with that adapter, so I tried to connect it to my PC monitor. What I did was:
1. Connect the adapter to the Edge using the USB cable (mini into the adapter, other side into the edge).
2. Took the PC cable out of the monitor and connected the other side of the multi adapter to monitor end of the cable of the PCF monitor.
So, the Edge's signal must run from the Edge, through the PC to the PC-monitor.
Which I find strange and which is maybe totally wrong, but that's how I understood the instructions.

After having made the connections I followed the instructions in the Edge manual: open the projector app, etc. Result: the PC monitor didn't do anything.
Did I do something wrong?