rtists can develop an entire style around an affinity for an elementary shape. Pablo Picasso loved cubes and circles. Mark Rothko was obsessed with soft-edged rectangles. Josef Albers played endlessly with the colored square. And celebrated High Desert artist-philosopher Andrea Zittel, who has spent more than 20 years exploring solitude and paring down her art—and her life—to its most spare and satisfying components, has a long-standing fascination with what she refers to as the planar panel. Basically, any purely
