Click Split screen to see the magnified (or unmagnified) view on one side of the screen.Click Fullscreen to zoom in or out on the entire screen when you use these zoom features.In Windows you hold the Control key and click on the other window. After you click on one of the windows you will see a small message pop up telling you how to select multiple windows. Select a modifier key, such as Control or Command. When you are ready to share both windows, use Zoom’s sharing dialog as you normally would.Check the box next to 'Use scroll gesture with modifier keys to zoom.'.Click the Accessibility icon (the blue-and-white person icon).
This makes it so you can press a key (such as Command) while you scroll up or down on the wheel/surface to zoom. If you're using a mouse that has a physical scroll wheel, a mouse with a multi-touch surface (such as the Apple Magic Mouse), or a laptop trackpad, you can use it to zoom and out in any window by associating a 'modifier' key. Enable the Scroll Gesture with Modifier Keys option.
