You can reduce a neighborhood's space directly from the floor map by changing selected seats to a non-neighborhood usage type.
Follow these instructions to reduce a neighborhood's space on the floor map:
Navigate to the floor map, and select one or more neighborhood spaces. Neighborhood spaces have purple centers. A data drawer will open.
This floor map highlights neighborhood spaces through the use of a Neighborhood View Filter:
Click Update Usage.
Change the Usage Type to Primary Seat. You can choose a different usage type if you prefer.
You'll receive confirmation that spaces have been updated.