No, not split screen. This is a different feature. To further clarify the question, here's an article about the feature from a different source: "Multi-window support isn’t the only awesome new multitasking feature in Android 7.0 Nougat: Google has also added a secret new shortcut for quickly s...

Hi! Android 7.0 Nougat introduced a quick switch feature between the last two launched applications on other phones. It is accessed by double tapping what they call the "recents" or "overview" button, which looks like a hollow square (right most button on the bottom of the screen...