Related Questions:
Can I edit more than one Item on an Event?
How do I update the serving time of multiple Items?
Procedure:
This is available from the Booking Summary. From here, you can batch update:
Description
Name
Quantity
Serving Time
Price & Tax Included Price
Access the Booking that has Menu Items associated with it
Click on the Menu Items Sub-tab on the Booking Summary screen
Select the Menu items using the checkbox on the left-hand side
Click Select Batch Action
Select Update
Click Apply
Select the Field you'd like to Update
Enter the new value
Click Save
Make the changes you desire
Click Save
Important Considerations:
This change is reflected only on this Booking, for the selected Menu Items. If the same Items have been used on other Bookings, they will not be affected.