At Planning / Setup / Location Preferences select the Sales Order Prefs tab. Select the Allow users to create DT from Sales Order in Agvance Sales app option. Save.
Mobile Sales App Setup
In Mobile Sales app at Menu / Sales Orders, toggle On the option for Create Unloaded Delivery Ticket.
When creating the Delivery Ticket, the Type must be set to either Pickup or Deliver and the Status set to Approved.
Creating a Delivery Ticket from a Sales Order displays a message Delivery Ticket Created. A Delivery Ticket was created with id XXXX. Tap OK.
The Sales Order is marked processed.