1. From Setup, enter Order Settings in the QuickFind box, then select Order Settings.
2. Make sure that Enable Orders is selected.
3. Save your changes.
4. Select which page layouts have an Orders related list, and then save your changes.
5. Use profiles or permission sets to assign user and object permissions to the appropriate users.
6. Create field sets (Salesforce Classic only) on orders and order products to control what fields appear on Visualforce pages.