Your Team Logo

Under Logo, click Choose logo… and pick an image. It's "shown in the top-right of the header and used as the default title-slide logo". Any image works — it's auto-shrunk to a sensible size, and square art fits the preview box best (wide art letterboxes). Clear removes it.

Unlike the appearance settings, the logo follows your account — set it once and it shows up on every device you sign into.