You can enter it as a Custom List.

Enter a,b,c,.. etc. in A1:A26. Select the cells and choose
Tools/Options/Custom lists. Click on

Import list from $A$1:$A$26

You will then be able to fill a series based on the custom list.




In article ,
"Dave" wrote:

I need to fill in the alphabet in a row and column.
I cannot get the drag handle to continue the series for me as it does with
numbers. If I begin with a,b,c,d it just repeats these letters rather than
continue the alphabet.
any help for this?