Settlement
Allow you to set a custom radius to notify entering players of your settlement’s name.
To do this you're required to have Scroll of the Hearth item.
Use the item, then this menu will appear.

Click Add Settlement then fill out all the form to create your first settlement.

Details
Settlement ID is a unique identifier for your settlement; it cannot match an existing settlement ID.
Radius X and Radius Z is the length and width of your settlement.
Welcome Message is the small text at the top side of the notification.
Settlement Name is the big text at the bottom side of the notification.