Artist vs Album Artist

I have a need to make the Album Artist column contain the same info that is in the Artist column. Is there a way to do this?

Do you really want the same value in Albumartist as in Artist all the time?
There is a reason for these different tags as an albumartist mostly is one person or band but the artists on one album not seldom are different persons or bands.

Anyway. This is very easy, either with the convert-menue (Tag - Tag) or the action-Menue (Format value).
When you are not so experienced start with the Convert-Menue, because it shows you the result in a preview.

Field: Albumartist
Format string: %artist%

If you only want to fill the Albumartist-tag if it is empty:
Field: Albumartist
Format string: $if2(%albumartist%,%artist%)