Use this procedure to specify the display of custom block components for an individual opening. If you are going to use custom graphics for a new component, draw the component and save it as a block before you start this procedure.
- Double-click the opening.
- On the Properties palette, click the Display tab.
- Under the General category, for Display component, verify that *NONE* is selected.
- For Display controlled by, select This object. Note: To apply your changes to all openings in the drawing, select Drawing default setting.
- For Display representation, verify that the desired display representation is selected.
- If necessary, expand Object Display Properties
Advanced, and for Custom block display, click 
(The number in parentheses indicates the number of blocks currently attached to the opening.) - If you want to turn off the display of custom blocks for this opening without removing them, select Disable Custom Blocks.
- Specify whether to add, edit, or remove a block component:
If you want to… Then… add a new block component click Add, and then click Select Block, select the block, and click OK. edit an existing block component select the component to edit, and click Edit. remove an existing block component select the block, click Remove, and click OK. - When adding or editing a block component, specify whether you want to scale to fit the block component to the object by width, depth, and height, or to lock the XY ratio:
If you want to… Then… set the block scale to the width of the object select Width. set the block scale to the depth of the object select Depth. set the block scale to the height of the object select Height. scale the whole block equally, so that one direction is scaled to fit another of the scale criteria select Lock to XY Ratio. scale the block to its original size clear all options under Scale to Fit. - Specify whether to mirror the block in the X,Y, or Z direction:
If you want to create a mirror of the block… Then… in the X direction select Mirror X. in the Y direction select Mirror Y. in the Z direction select Mirror Z. - Specify the X, Y, and Z locations of the insertion point.
- Specify an insertion offset of the block in the X, Y, and Z directions.
- Click OK twice.