Using keys only to angle down at the trim indicators in the 38, time of day, the elevator horizontal red indicator can barely to not at all be seen. Using TR, it depends on the time of day and if you use zoom when you look down.
Depending on the importance to a majority in the game, this might be a candidate for a HUD movable indicator. So many things now are tied to the sun to light up their brilliance, and the vertical red lines for rudder and ailerons appear by their orientation to have a stronger response.