Panasonic TH-86EQ2W 85.6" 4K Digital Signage Display - Manual (Page 150)

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English
Using the video mask function
1 Start “App Launcher” from the control menu.
2 Start [Mask picture] from App Launcher.
Two functions are available.
Spotlight mode
The entire screen is masked and a part is cut out in a square to show the image.
You can move it by dragging and pinch the four corners to change the size.
Shade mode
Sliding the mask, show the screen little by little.
You can adjust the mask width of the full screen width by pinching the four corners.
Also, you can move the mask position by pinching other positions.