Android Smart Lock -- in pictures

Here are your options:

More information on the Android Smart Lock feature here.

On-body detection: This detects when you've carrying your phone and moving and keeps it unlocked, and automatically locks your handset when you put it down.

Trusted places: Assign a location where your handset is unlocked.

Trusted devices: Keeps your handset unlocked when it is close to a trusted Bluetooth device (Bluetooth has an effective range of some 10 meters or so).

Trusted face: Set up facial recognition to unlock.