Newbie question: change column heading back to letter

[dredwin]

Sorry folks but I'm sure this is an easy answer that I haven't been able to figure out (and not able to find it using a search).

Somehow I changed my column heading so it lists it as a number. So before the first cell was listed as A1. Now it is listed as R1C1. I need to change this back since many of the other functions I want to use (like vlookup) use the letter and number combo and I'd confuse myself trying to change it.

Any help would be appreciated.

[Special-K]

Click the main Excel button top left corner to select Excel Options
Under Excel Options select Formulas
Under Working with Formulas ensure the box labelled "R1C1 reference style" is blank