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creATing forMUlA-driven MAssing 319

reference point in this exercise file, the Offset property was associated with a corresponding
L-parameter (Figure 8.78). The L-parameters refer to the level number of each of your point
elements. The first point element is associated with the parameter named L1 because it is
reference Level 1. The second point is associated with L2, and so on. When you associate a
property with a family parameter, you’ll notice that the button fills with a small equal sign.

Figure 8.78
Adding a parameter
to the point
element

By default, the reference point elements are just spherical nodes. Their reference planes are
not visible. To make them a little more usable for your modeling purposes, you can set them to
display their internal reference planes. With a reference point selected, in the Properties palette
you will find a property called Show Reference; set it to Always, and the reference planes of the
point elements will be visible (Figure 8.79).

Figure 8.79
selecting Always
next to show
reference

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