Thanks Jeff and Kannan for the replies.
The best I seem to be able to do (having tried your suggestions and a little more) is to have the full screen viewer AND the angle viewer on the Philips screen and all the rest on my MacBook. Not what I originally envisaged but I’m getting used to it rapidly. Actually, looking at it now, STARING at me, it makes sense. Those designers at Apple knew what they were doing.
Many thanks for your guidance!
FCPX and PPro 6. iMac 24 + MBP 15″. Near Geneva, Switzerland