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Show Used Items: When this option is selected the tree will show the items in the tree. You cannot purge while this option is on. Selecting items in the tree will show purge parameters for that item type. The parameters are displayed in a text box directly below this option check box.
Purge default linestyles: If this option is turned on un-used default linestyles will be purged from the drawing. This option is off by defualt. It is recommended to use this option with caution.
Purge default brushstyles: If this option is turned on un-used default brushtyles will be purged from the drawing. This option is off by default, it is recommended to use this option with caution.
Clear all undo records before action: If this option is turned on all undo buffers will be deleted. This prevents issues with attempt to undo purged items. This option is on by default.
Confirm each item to be purged: If this option is on you will be presented will a confirmation dialog for each item that is being purged from the drawing. This option is on by default.
