In the table of contents. Whilst in Drawing Order view it would be very helpful if a new context menu (right mouse click) item couild be added. The new item would allow toggling of the "selectable" status of the current layer.
Similar to "Make this the only selectable layer" but without the "only" condition.
If this cant be done then at least keep the focus on the same layer when moving between TOC views.
Hope this makes sense.