SOPP771: How can I know when to use the total legato touch, or the non-legato, in playing hymns?

Welcome to Secrets of Organ Playing Podcast No. 771! Today's question was sent by Arthur and he writes: "How can I know when to use the total legato touch, or the non-legato, in the execution of hymns?" Here you will find all my scores: https://www.sheetmusicplus.com/en/category/arrangeme/?q=Secrets+of+Organ+Playing&aff_id=454957