Hyperlink for icons do not work in Mac Mail signature
I've followed the instructions to add a hyperlink to a social media icon image in my MacMail signature. I have the icons added but when I select the icon and go to EDIT to select ADD LINK, it's grayed out. Command K doesn't work either. I've started with a completely new signature as recommended but that still didn't work. What am I doing wrong?
MacBook Pro 13″, macOS 12.2