Defines the face to mate to the top of the boss. The software automatically calculates the boss height. If you change the height of the mating face, the boss height changes too.
You can mate the boss to a face that does not contact the boss. For example, the mating face and the boss can be side-by-side.
In the image, the mating face is the bottom of the lid (transparent). The boss height is automatically calculated based on the mating face. The green highlighted edges show the mating face meeting the boss. The mounting pin penetrates the lid.
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