Use the ePrivacy screen
Your computer might
come with an ePrivacy screen. It can reduce screen visibility from
side angles to protect screen content against visual hacking. By default,
this function is disabled. You can press F12 or Fn+D to enable it.
You will be prompted by the on-screen icon 
or 
every time the function is enabled
or disabled.
Your ePrivacy screen can be automatically enabled in case that you are required to input passwords. By default, this automatic function for passwords is disabled. You can enable it on the Vantage app.
Set the privacy level
The privacy level
of this function varies depending on the screen brightness level,
the contrast ratio, and the physical environment where you are using
this function.
Press
to increase the privacy level.Press
to decrease the privacy level.