abstract:line-of-sight] between an intended observer (or spectator) and a stage, arena, or monument, for example. Sightlines are a particularly important consideration in theatre and stadium design, road junction layout and urban planning.
There was the time, at 16, when she didn't much like her leading man, so she put a piece of chocolate cake in her sightline offstage so she could instead lust after that.
The labels are informative little essays nicely placed like slanted tabletops, below sightline. (The cartoonish icons for the audio guide, however, are inexplicably placed right next to the paintings on the wall.) And the subtopics landscape and portraiture, what was painted overseas versus what was created back home in America, etc.