Use in-canvas controls to change the grid layout for a curtain wall.
Select a curtain element face and click  (Configure Grid Layout); a curtain grid layout interface is opened over the curtain grid face. The interface lets you graphically change the instance parameter values of the face.
 (Configure Grid Layout); a curtain grid layout interface is opened over the curtain grid face. The interface lets you graphically change the instance parameter values of the face. 

Layout interface controls:
| Control | Description | 
|---|---|
|  | The justification origin. Click the arrows to change the justification scheme of the grids. The horizontal arrow changes Justification (Vertical Grid); the vertical arrow changes Justification (Horizontal Grid). | 
|  | Origin and angle (Vertical Curtain Grid). Click the controls to change their values. | 
|  | Origin and angle (Horizontal Curtain Grid). Click the controls to change their values. |