This form is displayed from the Block - Purge tool.
All unreferenced blocks and symbols are displayed. A tree structure is used so that you can see which layer each unreferenced block is in.
Select the names of all blocks and symbols that you wish to purge and then press Purge. Alternatively simply press the Purge All button.
Blocks and symbols that are purged are removed completely from the drawing.
Purge blocks
Related topics: Blocks