Purging Unused Objects
The Purge Unused Objects command permanently removes specified unused object types from the drawing and reduces the file size.
To purge unused objects:
1.
Select Tools > Purge Unused Objects.
The Purge Unused Objects dialog box opens.
2.
 
3.
A confirmation dialog box opens.
4.
Click OK to confirm the purge.
The purge command cannot be undone.

Common Functions and Utilities : Removing Objects : Purging Unused Objects

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