Buttondown Documentation
In Buttondown, you can specify a “share image,” which is the image that platforms like Twitter, Facebook, iMessage, etc. will use when you share your email’s web link.
You can set this image for all newsletters in Design section of Settings.
There may be times where you'd like to set a special image for a single newsletter. Buttondown makes that easy!
Buttondown allows you to pick any image that you’ve used in your newsletter, or you can upload your own.
To set a share image for an email:
One template places more emphasis on your newsletter’s name:
While the other places more emphasis on your email’s subject line: