In order to split a group reservation into separate reservations, right click to show the drop-down menu and choose Split Reservation option:
You will see a window with the guest list.
Choose the option Assign balance to each guest if you want each guest to pay his bill.
Or Assign balance to the selected reservation if you want one guest to pay for all the rest.
Each split booking will change the ID to XXXX-split-1, XXX-split-2 etc.
IMPORTANT
Please note that you cannot split guests which are in a Double bed.
When you split a portal reservation, for example from Booking.com, its ID will be changed (from 1234567890 to 1234567890-split-1, 1234567890-split-2, etc.). The system recognises reservations by the IDs, so you can not receive modifications or automatic cancellations for split reservations because the reservation IDs do not match. However, you will receive a notification for each original reservation change so that you can adjust the reservation in the system manually.