This section allows you to add a new supplement (previously created, refer to the guide Supplements) whose price will be added to that of the reservation.
The fields to fill in are:
From: represents the date of start of supplement's validity
To: represents the date of end of supplement's validity
Once the supplement is associated with a period, the corresponding row will appear with the “Active” checkbox, which will be useful if supplements from derived or cloned contracts are to be deactivated: