Got a new Apple Pencil? Once the initial novelty wears off, you might find that it spends most of its time magnetically clipped to the side of your iPad Pro or, worse, stuck in the back of a drawer.

Known for his hyper-realistic pencil artworks, Kelvin Okafor is using his latest exhibition to call attention to visible skin differences. “Drawing Awareness,” at London’s Hope93 Gallery, features ...