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Click Tools > Collision Detection > Edit Collision Sets.
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Click the Type Filter tab.
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In the Collision set name box, select a name.
OR
Edit the Default Collision Set. -
Click the Geometry Filter tab.
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Under Non-linear graphic elements, select All types or Selected types. For more information about the geometry filters, see Geometry Filter Tab (Edit Collision Sets Dialog Box).
If you choose Selected types, you can choose the individual types of geometry to filter.