At the bottom, click More Change layout . Choose an option:
Auto: The view that Meet chooses for you. By default, you’ll see 9 tiles on your screen.
Tiled: The view that can show up to 49 people at the same time. By default, you’ll see 16 tiles on your screen.
At the bottom, move the slider to the number of tiles you want to see on your screen. The number of tiles you choose becomes the default for future meetings until you change it.
Spotlight: The active speaker or shared screen fills the entire window.
Sidebar: The main image is the active speaker or shared screen. You’ll see thumbnails of additional participants on the side.
Your new layout preference is automatically saved.