Select the unit shutter desired, click on the Shutter tab in the lefthand panel.

Click on the Construction icon on top, and open the Divisional Shutters dropdown.

Select 'Add Horizontal Divisional Shutter' or 'Add Vertical Divisional Shutter' depending on what kind of divisions you need.

To add another of the same type, select 'Add Horizontal/Vertical Divisional Shutter' again.

Select the unit shutter desired, click on the Shutter tab in the lefthand panel.

Click on the Construction icon on top, and open the Divisional Shutter Ratio dropdown.

Enter the desired ratio terms against each panel field.

Select the concerned shutter division, click on the Panel tab in the lefthand panel.

Click on the Customize icon on top.

Click on 'Delete Divisional Shutter Panel'.