Question: Pre-populate Subject field in hyperlink
I can insert a hyperlink in Mail ok (its my email address) but I want it to pre-populate the subject field in the reply. I cannot find a way to do this. I can edit the hyperlink but only to change the url.
Basically I'm trying to have a " Click Here" hyperlink that pre-populates the return email with the subject already inserted.
Read all sorts of things but nothing that works. Beginning to think it cannot be done.
Thnx for any help
MacBook, macOS High Sierra (10.13.1)