How to make hidden windows visible
From the taskbar displaying the active applications, hover your mouse over the application icon with the hidden window.
Move your mouse over the miniature of the hidden window.
Right-click.
The following dropdown displays:Click Move.Â
Now, you can use your arrow keys to move the window. You should also just be able to tap any of the arrow keys and then move your mouse slightly to have the window pop back onto the screen.
Press Enter to anchor the formerly hidden window.
You can also try to Maximize.