Use this procedure to assign materials to the individual components of a mass element. 
- Select the mass element to which you want to assign materials, right-click, and click Edit Object Display. 
 
- To verify that the material assignment determines the display properties of the component, click the Display Properties tab, select the display representation where you want the changes to appear, and click 
.  
- Click the Layer/Color/Linetype tab, verify that By Material is selected for the component, and click OK. 
 
- Click the Materials tab. 
The Component column displays all components of the mass element that can be assigned a material. Components that are only symbolical graphics, like the bounding box, are not listed because they cannot have a material assignment. 
 The Material Definition column displays the currently assigned materials. If no previous material assignments were made, the default material is Standard. 
  
- Select the component you want to change, and select a different material definition. 
You can select any material definition in the current drawing, or click 
 to create a new material definition and assign it to a component. 
 Danger: Although you can edit a material definition from this dialog box, any changes you make to the material definition apply to all objects that are assigned the material. 
  
- Click OK twice.