Changing Display Column Header

SUGGESTED

Good afternoon, I am new to Sage and Crystal Reports so sorry for all of the questions. I am looking to update a column header and have no clue how to go about this or how Crystal Reports works. I am in Designer, and looking to edit the screenshot shown. 

If I right click to edit formula, this is what I see.

How do I change the Display Column Header name that actually shows when I print the report from Sage?