In Preferences > Fields > Birth I have selected 'Baptism' in the box at the bottom that has "If no birth date exists substitute ... " however it doesn't seem to work. (I assume this is a global substitution, not specific to one person/couple/family?).

I would like it to appear in the normal family view but I think it only comes into play in a chart, but even then it doesn't seem to substitute for me. What am I doing wrong please?