I don’t even know what the shaded bar markers are called so can’t even search for them! Over each bar is a blue shaded rectangle with the bar number in it - if I click on it I get a dustbin on the left and an empty square on the right. What are these rectangles? Is it possible to switch them off?
If not, and an e.g. expression marker sits completely in the middle of the shaded rectangle, how can I select that marker? If I try to click on it I just end up clicking on the rectangle instead.