You can convert a compound object, such as a polyline, dimension, hatch, or block reference, into individual elements.
Use this procedure to break an inserted block reference into its component parts without affecting the block definition.
Click ModifyExplode.
Select the objects to be exploded.
Note: If you explode a block with attributes, the attribute values are lost, leaving only the attribute definitions. The colors and linetypes of objects in exploded block references can change.