Thank you, Suzanne.
I still have access to Word 2003, so I tried working with bullets and
numbering in both 2003 and 2007. Applying the List Continue styles only works
if you are using one of those styles, which makes sense, as you are applying
a specific style. That approach requires that there be a Continue style for
every List style. They do not appear to exist by default--Outline numbering
styles, for example--and in any case, developers would have to create them
for new bullet and number styles.
If you place your insertion point immediately to the left of the first
letter of text in a list item, after the bullet or number and its associated
tab, and press the Backspace key, the bullet or number is removed and the
formatting is retained. This is more cumbersome than clicking a Skip
Numbering button from anywhere in the item, but does result in the same
outcome as 2003's Skip Numbering.
I suppose one solution might be to write a macro that goes to the beginning
of the paragraph, backspaces, and then returns to the point of origin. That
could be used on any style, much as Skip Numbering could.
Thank you for your suggestion.