Not all apps support it, but there are a couple of ways:
1) Tap and hold and Drag the app from the corner towards the center of the screen to turn into a floating window. Then, from the window, just minimize and it turns into a floating bubble.
2) Tap the multitasking button and find the app you want to minimize. Then, tap and hold the app and drag into the blue area that appears in the center of the screen. This will open the app into floating mode, which then you can minimize into a bubble.
For either option to work you need to activate it in the Settings, however (Settings/Advanced Features/Multi-Window).
05-24-2018 12:11 PM