Creating Instance Parameters

As you create families, you can specify labeled dimensions as instance parameters; the parameters are modifiable when the family instance is placed in a project. Labeled dimensions specified as instance parameters can also have shape handles that display when the family is loaded into a project.

1. Sketch family geometry using Family Editor tools.
2. Create dimensions for the family geometry.
3. Label the dimensions. See Labeling Dimensions to Create Parameters.
4. Select the dimensions and, on the Options Bar, select Instance Parameter.
   Note: If you label dimensions by selecting a label on the Options Bar, you can select Instance Parameter without re-selecting the dimensions.
5. Click Modify | Dimensions tabProperties panel (Family Types).

   In the Family Types dialog, notice the new instance parameter. The (default) label indicates the value for the instance parameter when you place the family in a project. For example, if you create an instance parameter called length with a default value of 3000 mm, the family instance will have a length of 3000 mm when placed in a project.

6. Save changes and load the family into a project. Select an instance of the family, and on the Properties palette, notice that the labeled dimensions are available for modification.