You can switch Zoom to portrait and landscape view by clicking on your profile icon. The portrait mode in Zoom app makes its interface smaller and it does not display all the options. Only the necessary options are visible on the Zoom interface in portrait mode. The landscape mode in Zoom app covers your entire screen and displays all the options on the Zoom interface. Both of these modes have their own significance. Hence, it depends on you which mode you like to use in Zoom.