There is something out of the ordinary here. If you glanced, then you may have missed it. But if you took note and got past the unfortunate poor quality of the above image composite, then you probably spotted the curious lozenge-shaped marks that appear both in plain sight and tucked neatly into corners. The marks—an early sort of graffiti tag—were created by artist Richard Artschwager to draw attention to places and things that typically go unnoticed. There’s a whole room devoted to these brilliant marks—called blps—at Artschwager’s current retrospective at The Whitney, and even more installed on and along The High Line. Both are on view now through February 3, 2013.

Image: Richard Artschwager, blp Portfolio (six works), 1996. Chromogenic prints, 4.75 x 7.” Private Collection, New York.