関連ワード:  how to enable split screen on iphone    how to enable split screen on iphone 13    how to enable split screen on iphone 13 pro    how to enable split screen on iphone 11    how to enable split screen on iphone 15    how to enable split screen on iphone x    how to use split screen on iphone    how to enable split view on iphone    how to use split screen on iphone 16    how to use split screen on iphone 15