Removing outline numbering from heading styles?

[DebsH]

Having updated my heading styles by applying a multilevel list (i.e. 1, 1.1,
1.1.1), how do I permanently revert back to simple headings without numbers?
I can remove the multilevel list from the text itself, but subsequent new
headings continue to be numbered. I can update each heading style in turn to
match a selected heading that has had numbering turned off, but there must
surely be a way to remove the outline numbering from all the styles despite
the fact that outline numbering is no longer accessible via Modify Style?

 

[Stefan Blom]

Place the insertion point in the first Heading 1 paragraph of your document,
and then click Home tab | Multilevel List | Define New Multilevel List. In
the dialog box, make sure to set "Link level to style" to "(no style)" for
each numbering level. When you are done, click OK to close the dialog box.