Defining Custom Zoning
If you enable the zoning option for automatic placements, you can have Open Plan group activities in zones defined by criteria that you specify.
For example, you can zone a project based on an activity code.
You can define as many as 50 zoning criteria for the calculation of automatic placements. To define how the view should be zoned, click Zoning in the Placements dialog box to display the Zone Attributes dialog box.