This is similar to deleting a service, except you can always restore an archived item.
Go to Settings -> Extras Click Add New Enter values for Name and Price. Click Save.
Overview You can organize your services into different categories. When you do so, customers can choose to view all of your services by category when they’re filling out your booking form. Create [...]
Go to Settings -> Extras Drag and drop an Extra to a new position in the list Your Extras will be displayed in your Booking Form identically to how they appear in this list.