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Click Place or Remove Opening on the vertical toolbar to display the Place Opening Ribbon.
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Select the SIO wall or SIO slab in which to place an opening. A SIO slab is selected in the example below.
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Select Place Opening from the Operations list.
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Define the sketching plane for the opening.
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On the Draw toolbar in the Structure Draft 2D environment, click Curve .
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Click Add References to Sketch 2D .
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Select objects that you need to reference when placing the opening.
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Click Draw .
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Using the available drawing commands in the 2D environment, draw the opening.
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Click Close on the ribbon bar.
A preview of the opening that you drew displays in the 3D environment.
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Click Finish.