In the Window or Door Marker to have an option to show height of door/window top
which often is also the height of lower level of lintels above those openings.
At the moment I count those levels by hand on a calculator and type in as basic text - this is a great place to make a mistake which goes to framework drawings (ups ! )
Also the window showing height of the sill makes sens.... but a sill of door in 80% of cases doesn't make sense. If there is a sill option to show I think adding opening height to the sill gives the top level - easy thing to do.
Of course this top level should have an option to be counted from wall base, mother story level and to project zero...