I think it is the same in 2000 (we have 2002). Go to ASSIST >> MECHANICAL OPTIONS, then under the standard that you are using (i.e. ISO) there should be a branch for HOLE CHART. Select it and a dialog should come up, at the top of the dialog is a column property button, select it. From there, each column is listed "by rows". Select the one you want to delete (uncheck it), you may have to "unlock" it depending on the setting, by unchecking the "Visible in Hole Chart" box. I hope this helps and pertains.
BU
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.. Henry Ford