Samsung SM-G935F User Manual page 45

Basics
Edge lighting
The Edge screen lights up when you receive a call or notification while the device's screen is
facing downwards.
On the Apps screen, tap Settings → Display and home screen → Edge screen, and then tap
the Edge lighting switch to activate it.
You can reject incoming calls using custom rejection messages. While the device's screen is
facing downwards, hold your finger on the sensor on the back of the device for two seconds
to reject calls.
On the Apps screen, tap Settings → Display and home screen → Edge screen → Edge
lighting → Quick reply, and then tap the switch to activate it.
To edit the default rejection message, tap the message text under QUICK REPLY MESSAGE.
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