The zone is created by selecting the elements that will delimit the zone with the Free Mode Zone command by selecting contour.
Location of Free Mode Zone
You can access it under the Ribbon menu Home tab, Zone title.
Click the Free Mode Zone icon.
Select the boundaries in order to create a closed area (wall, column, etc.) that will limit the zone.
As soon as the last element is selected, the zone text block will appear in the middle of the zone and the zone will be created.
Selection of the elements that will limit the zone
The formation of the zone