How can I get back my full screen back without line

When I rebooted my MBA M1, I see the screen with divider, like a horizontal split screen, with the top pane showing a zoom version of whatever I'm doing in the bigger screen. The line is not movable. Please help!

You’ve enabled split screen zoom.

Go to System Preferences → Accessibility → Zoom.

• If ‘Use keyboard shortcuts to zoom’ is enabled, use option-command-8 or the shortcut shown on screen if different to toggle zoom off.
• If ‘Use scroll gesture with modifier keys to zoom’ is enabled, hold the modifier key shown and scroll the mouse wheel to zoom out.
• If you still want to use the zoom accessibility feature but don’t want the screen to split when doing so, change the zoom style from ‘split screen’.