Hi
not directly supported by Excel. You'll need some Windows API function calls).
But maybe you'll want to have a look at the following addin:
http://www.jkp-ads.com/OfficeMarketPlaceNM-EN.htm

"Colt GraceMark" wrote:

How do I widen the column width of the drop down window containing the list
of cell and range names in the Name Box navigator at the top left of the
screen?