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Before

After

1. On the [Model] tab, go to and click ▼ at the side of [Sheet Body] .
   
   Then click [Track] on the submenu.
    

2. Designate the 1st center.
   
   In the parameter input dialog box, enter Startpoint (X:23.5, Y:5, Z:8) and click .
    

3. Designate the 2nd center.
   
   In the parameter input dialog box, enter Startpoint (X:26.5, Y:5, Z:8) and click .
    

4. Set the radius.
   
   Enter Radius: 1 and click .

5. Click in the parameter input dialog box and exit.
   Let's extrude the body

6. On the [Model] tab, go to
   
   
   
   and click [Extrude] .

7. Highlight the track created at 5 and click to select.

8. Click in the parameter input dialog box.

9. Enter the extrusion vector (X:0, Y:0, Z:1) in the parameter input dialog box and click .
   
   The opening for the microphone is now ready.