# Formulas in Data Field Type & Data field

In Base Report Design how to I enter a formula here:

I want to put in something like for example CONCAT(`FieldName1`

, ' ', `FieldName2`

) in for the `Data field`

. It appears that it will take this from the `=`

sign here but I can't figure out how to enter a formula.

*I know that I can do this in the underlying query, but it just seemed like I was also able to do this in the Report design editor.*