Space and zone visiblity must be activated for the view to allow selecting spaces that you are adding to a zone. 
- Open the floor plan that contains the spaces that you want to add to a zone. 
 
- If the spaces that you are adding to a zone are on different levels, open the section view together with the floor plan, and type 
  w t on the keyboard to tile the views. 
  
Note: Zones and spaces can be viewed in a section view, but do not display in elevation views or 3D views. 
  
 
 
- Select an existing zone, and click Modify | HVAC Zones tab
Zone panel
 (Edit Zone), or create a new zone. 
 
- Click Edit Zone tab
Mode panel
 (Add Space). 
 
- If you are adding a single space to the zone, place the cursor over a space, and after the space highlights, click to add the space to the zone. 
  
To add multiple spaces to a zone draw a selection box around the spaces being added, or press 
	 CTRL while selecting spaces one at a time. 
  
 
 
- Click 
  
 (Finish Editing Zone). 
  In the System Browser, notice that the spaces that you added moved from the Default zone to the zone that you created.