Samsung galaxy note 7 User Manual page 273

Quick Reply Settings
Quick reply allows you to reject an incoming phone call with a text message by placing your finger on the
heart rate sensor for two seconds. The call is rejected, and a preset message is sent to the caller.
To turn on and configure Quick reply:
1. From home, tap Apps
2. Tap Edge screen.
3. Tap Edge lighting > Quick reply.
4. Tap On/Off to enable Quick reply.
5. Tap the message to edit the text reply.
6. Tap Back to save changes.
Device Settings
> Settings > Display .
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