Related Questions:
How do I adjust Contracted Rooms?
How do I update Contracted Rooms?
Answers:
Contracted Rooms can be edited from within the Group. From the Booking Summary Page, click Edit
Click Contracted
From here you can show/hide the contracted rooms in the Group, copy blocks, which will adjust the number of Rooms in the Contracted column to match the number of Rooms in the Blocked columns, or edit them if they differ from the Block.