mary;
If it's a simple list of the days of the week or months, then you should be
able to simply type in the day (ie: Monday) and then drag it down or across
and XL will auto-populate the list recognising the format and the data. You
don't need to create a custom list.
However, if it is a unique list, such as names of students, etc. then I'll
refer you to Roger's answer.
Dan Knight