When you select a curtain grid element face, you click the control 
that is displayed; 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. |