Once you have ensured that a block library drawing conforms to all the previously explained guidelines, the final step is to remove all unnecessary objects by performing the following procedure.
- Use the ZOOM, EXTENTS command to display the extents of the current drawing.
- Enter WBLOCK (for Write Block).
- In the Write Block dialog box, under Source, select Objects.
- Under Base point, click the Pick point button, and then select a base point in the lower-left corner of the drawing extents.
- Under Objects, with Retain selected, click the Select Objects button, specify a crossing window over the entire contents of the drawing, and then press Enter.
- Under Destination, enter the name of the drawing to be created (for example, enter the name of the current drawing with a “2” appended), and specify the units to be used for automatic scaling when the block is inserted into a drawing that uses different units.
- Click OK.
- Close the drawing.
- Using Windows Explorer, delete the original drawing.
- Rename the new drawing by removing the “2” you appended.
The new drawing now contains only the entities you selected and any other entities directly or indirectly referenced by the selected entities. In other words, the drawing contains only the absolute minimum set of objects that it needs.