How can I have a pivot table sorted by the sum of column values automatically instead of manually sorting each time?

I have created a pivot table in the Pivot Builder and it shows the information that I need. However, I want the pivot table sorted by the SUM of the column values (which is the data I am showing) rather than the "split rows" field. I can sort the pivot table manually each time by clicking the column header - but how do I save this into the pivot table? I cannot simple sort the source data as the pivot table is doing the sum on the source data for me.