@wim I have tried those settings in V7, as far as it provides them. Clearly V8 has more settings, but I do not yet have it. That should solve part of the second issue. From what I see, I am not sure that they address the main problem which is that when I create a new layer, the objects of that new layer are visible in layout details which already existed. In V7, I still have to hide the new layer in every layout detail. Any thoughts?
I have checked V7 for the layout corruption after the Ctrl Z, and it is OK, so the gremlin is V6 based. I now cannot reproduce the behaviour in V6, so it is probably best that you do not spend much time on what might be a V6 based intermittent problem. I will provide more details if I see a better sequence of events that cause the problem. Ignore that. The corruption exists and is reproducible in both V6 and V7. I forgot the set all layers visible after the Ctrl Z, so the layout details did not show the corruption. Turn on all layers and the corruption is there.
Regards, Garry.