Link a family parameter to the object, as follows:
In the drawing area, select the geometry to which you want to apply a material.
You can assign a different material to each part of the component.
On the Properties palette, for Material, click in the Value column, and click .
In the Associate Family Parameter dialog, select a parameter, or create a new one.
When creating a parameter, in the Parameter Properties dialog, do the following:
For Group parameter under, select Materials and Finishes.
Select Instance or Type depending on whether you want to be able to change the material for an element using instance parameters or type parameters in a project.
Click OK twice.
Apply a material to the family parameter, as follows: