Click Tools/Options on Excel's menu bar, select the General tab on the
dialog box that appears and uncheck the box next to the label "R1C1
reference style" in the Settings section.

Rick

"plumeria54" wrote in message
news
My spreadsheets suddenly show numbers for the columns instead of
letters --
columns now showing as 1,2,3,4, instead of A,B,C,D. Also formulas in
cells
now showing up, for example, as RC[-2]*R[-4]C instead of G8*H5
How do I change the columns back to letters?