The premise zone is the radius distance around a branch/kitchen where when drivers are inside of it, they are marked as available for collections, and when outside of it, they are marked as off-premise. It also auto-marks the completion of a trip upon the return of a driver to the branch. It is set by default to 100 meters.

To edit the branch/kitchen premise zone, go to: Side Menu → Settings → System Preferences
You can edit the premise distance by changing the distance selection.