To do this, follow these simple steps:
Step 1: Go to ‘Payment Options’ > ‘Optional Extras’.
Step 2: To the right of the Optional Extra you wish to edit, click on ‘Edit’.
Step 3: A box will then appear displaying the setting options for the Optional Extra you wish to edit.
Step 4: Once you are happy with the new setting options, click ‘Save and Finish’.
Your Optional Extra will now be updated - simple.