Sketching out rough ideas—traditionally on the back of a napkin in the US, backs of envelopes being preferred in the UK—is a common and important part of the design process, with the familiar pen or ...
Susan Kare, “Sketches for Graphic User Interface Icon” (detail) (1982), ink on graph paper, on view in ‘This Is for Everyone’ at MoMA (gift of the designer, 2015, photo by the author for Hyperallergic ...