I have used view regions for a lot of things but this one has me baffled.
I have a split stair - it goes up with one wide stair to an intermittent landing and then splits off to both sides. Main stair goes to a landing level - complete with level line and plan view. The two sides go from stair landing level to second floor.
I cannot see the upper stairs in the first floor but I can in the second floor. I create a view region in the first floor plan and it does not matter what I set the view to I CANNOT see those stairs.
I have checked for objects turned off in that view. I have set the view to be related to the stair landing level, first and second levels. No dice.