For X Dispatch 17.1 or newer. See here for older versions.
Mobile Users are displayed once a driver record is created and is associated with a human resource record in X Dispatch. Each new mobile user is automatically assigned to the default mobile option group and the specific settings within that group. See Mobile Option Sets (Desktop Operations App).
Mobile users are displayed based on the Status listed in the human resource record of the specific driver. You can select to view "Active", "Inactive", "Terminated", or "View All".
Go to Maintenance > Mobile Users
You can edit each mobile user to have their own unique Nextstop settings.
You can create a new mobile option set from a mobile user's setting by clicking the Duplicate button at the bottom of the form.