You can add custom blocks for components, such as hardware, to the display components or to replace the default display components. You can have a different custom block for each display representation.
You can specify several rules for positioning and scaling the new component. Each custom block also appears in the display properties component list so that you can control its layer, color, and linetype.
If you create a custom block from mass elements, you can use the material assignments of the mass elements to determine the display properties of the custom block.
Be sure to set the properties of the objects used to create your custom blocks to ByBlock. Otherwise, you cannot control these objects through the display properties.