Use this procedure to insert objects, such as curtain wall units and AEC Polygons, into a curtain wall cell. Curtain wall cells can contain these objects when you create infill definitions that use them. 
Tip: After you insert an object in a cell, you can select that object independent of the grid, right-click, and access editing options for the object. 
-   Click 

 . 
  
-  Expand Architectural Objects, and expand Curtain Wall Styles. 
 
- Select a curtain wall style. 
 
- Click the Design Rules tab. 
 
-  In the left pane, select the grid in which you want to insert objects. 
 
-  Click New Cell Assignment. 
 A new cell assignment is displayed in the list of cell assignments. 
  
-  Select the cell assignment in the top right frame, right-click and click Rename, and then enter a descriptive name. 
 
-  Select an infill that uses an object style. 
 
-  Specify the cells to contain this object. 
 
- Click OK.