That is, easy, for those who know.....

Q:
My columns used be labelled as letters, now they are numbered.
No idea how it changed and would like it back how it was.

Cheers Alan

You have the "R1C1 reference style" enabled. If you have 2010 then it's in File|Options|Formulas, but I can't remember where it is on earlier versions.

This was it....

Cheers

Damn, this site is good....

Right click on columb, format cells then letters