The following procedure describes how to apply the Make Transparent VHL graphic rule option to orthographic drawings. It shows how you can use the Make Transparent option to make pipe objects under a slab visible through the slab object graphics.
Without using the Make Transparent VHL graphic rule option, a drawing of this type displays as follows:
Create a View Style Using a Make Transparent Option
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In the Drawings and Reports task, select Tools > Define View Style.
The Define View Style dialog box displays.
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Select Orthographic View Styles as the View Style Type, then click New Style
. Give the new style a name, and click Properties 
to display the View Style Properties dialog box. For more information, see View Style Properties Dialog Box.
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On the View Style Properties dialog box, create a filter for the view style. In the Filter Name box, select a filter that looks for the slab objects, and then create a new graphic rule that sets the Make Transparent option for the slabs to For all objects in view.
For more information, see Graphic Rule - VHL Dialog Box.
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Your filter setting to collect your pipeline objects should use a standard graphic rule.
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Click OK on all the view style dialog boxes to save the changes to the new graphic rule and the view style. You can now use this view style to create fill style drawings.
