To split the screen on iPad, start by selecting one of the open apps, then drag it over to the side of the screen until you see a double horizontal line appear. This marks the starting point for your split-screen session. Next, tap the '2x' button in the top right corner of the screen, and three more options will become available: left, center, or full. Choose where you want your second app to sit on the screen, then tap 'Done.' You can easily adjust the position of each app later by dragging it back to its original starting point and adjusting from there.