While a Link rings, the person you are calling is shown large with their name and “Calling…”. Once they join, everyone in the Link and every shared screen gets its own tile, the person speaking is outlined in green, and the header shows LIVE and how long the Link has run.
The bar along the bottom has People, Mute, your camera, Share screen, Captions, React, Chat, More and Leave. The arrow at the top left folds the room into the small call bar so you can keep working, and that bar’s own button opens the room again. On a phone a Link keeps its full-screen call screen, and Kemble Circle is unchanged.