How to Display UWP Apps in Full Screen View in Windows 10
Universal Windows apps (aka: modern apps) can now be opened in resizable windows on your desktop like any other app now in Windows 10.
When you display a universal app in full screen view, it will not always stay that way. The next time you open the app, it will display in a window on your desktop as usual.
While you have tablet mode turned on, app will always open in full screen view and cannot be reduced.
This tutorial will show you how to display UWP (Universal Windows Platform) apps in full screen view in Windows 10.
CONTENTS:
OPTION ONE
To Display App in Full Screen View
1. While you have a UWP app open, press the Shift+Win+Enter keys to toggle full screen off and on.
OPTION TWO
To Display App in Full Screen View
1. While you have a UWP app open in a desktop window view, click/tap on the
Full screen button

at the top right corner. (see screenshots below)
OPTION THREE
To Exit Full Screen View for an App
1. While you have a UWP app open in full screen view, do
step 2 or 3 below for what you would like to do.
2. Swipe down from top border or
move pointer to top border of the app to have the
title bar slide down, and click/tap on the
Exit full screen button

at the top right corner. (see screenshots below )
3. If you have
multiple displays, then you can also click/tap on the app's taskbar icon to minimize it, and click/tap on the app's taskbar icon to restore full screen again.
That's it,
Shawn