Use this dialog box to select a type of centerline .
Options:
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               Icon  | 
               Function  | 
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               Creates a centerline cross on a plate  | 
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               Creates a centerline cross in a hole  | 
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               Creates a centerline cross with angles  | 
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               Creates a centerline cross in a corner  | 
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               Creates a centerline between two lines  | 
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               Creates a centerline cross on a full circle  | 
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               Creates a centerline  | 
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               Creates a centerline cross with a hole  |