I searched and found this to delete Layer Filters: (defun C:fe () (vl-Load-Com) (vl-Catch-All-Apply '(lambda () (vla-Remove (vla-GetExtensionDictionary (vla-Get-Layers (vla-Get-ActiveDocument (vlax-Get-Acad-Object)))) "ACAD_LAYERFILTERS"))) (princ " All layer filters have been deleted.") (princ) ) Could someone tell me how to use it? I'm assuming it's a Visual Basic routine? Sorry...I'm REALLY naive on this stuff.....but these filters are driving me up the wall....and there is about 300 of them. TIA