I'm not entirely sure what you're talking about.
I will assume you're referring to multi window and floating apps.
The Note 5 doesn't have the multi window bar on the side. As mentioned above you now access it by holding down the recent apps button.
You can make the floating apps in two ways. The way most people know is to open an app that supports multiple window and drag from the very top of the upper left corner.
The easiest way is to open an app that supports multiple window, then tap the recent apps button, then press and hold the app.