Hello Micheal,
Actually there is still a possibility to turn 'Shadow Mode' on and off, but it is not in the 'Display Control'
From the 'Menu bar' select 'Analysis --> Analysis Control'. The 'Analysis Control' window will open up. On the top right side
you will find the selection box for turning Shadow Mode on or off.
So the functionality is still there. But on a strange place.
regards, Charles
BTW, There is also a shadow mode switch at the 'Display Control' window at 'DRC->Hazards->Color By Hazard'. But this switch does not work for planes.