If you would like to alter a time slot to suit a customer's request you can manually change the time of a time slot. Note, this must be done prior to making the booking.
Navigate to the time slot you wish to change the time for.
Click the edit button to the right hand side of the green bar.
Select the time you want to change it to using either the arrows or by clicking on the hour and minutes.
Click 'Modify Slot' to apply changes.