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Before

After

1. On the [Model] tab, go to and click [Rectangle [Specify Length]] .
    

2. Designate the start point.
   
   In the parameter input dialog box, enter Startpoint (X: 0, Y: 0, Z: 1) and click .
    

3. Set the width.
   
   Enter Width: 20 and click .

4. Set the height.
   
   Enter Height: 2 and click .

A rectangle has been created.

* In this figure, the created rectangle is selected.

5. Create another box for the ambient air (AIR).
   
   In the parameter input dialog box, enter Startpoint (X: 10, Y: 2, Z: 1) and click .
    

6. Set the width.
   
   Enter Width: -2 and click .

7. Set the height.
   
   Enter Height: 6 and click .

8. Click in the parameter input dialog box and exit.

We now have two rectangles.

* In this figure, the rectangles created here are selected.