How to Enable Freeform Windows Mode in Android 7.0 [No Root Required]
Step 1. Open the Settings app.
Step 2. Go to About Phone.
Step 3. Tap the build number seven times and developer options will be enabled.
Step 4. Go to Developer options and scroll down to the very bottom.
Step 5. Enable the ‘Force activities to be resizeable’ option.
Step 6. Install Taskbar and grant it the permissions it asks for.
Step 7. Clear all your recent apps and restart your device.
Step 8. Once you’ve restarted your device, launch Taskbar. It adds a floating button at the bottom.
Step 9. Tap the overview button and then tap taskbar’s floating button. You will see a list of all the apps installed on your device.
Step 10. Tap a device and it will launch in freeform mode.
Tap Taskbar’s floating button and launch a second, third, and fourth app from the menu. The apps launch as windows like they would on a desktop. You can drag them around and position them any way you want.