How to add the Subject field above the iMessage field in iMessage on a MacBook Pro?
My MacBook Air was over ten years old. I now have a new computer and still have the same question. My iPhone and iPad both have a Subject field above the iMessage field for text messaging. How can I add a similar Subject field in iMessage on a MacBook Pro running Sonoma 14.4.1?
MacBook Pro (M3 Pro, 2023)