How to add canonical url to my old blog post ?

I tried adding a canonical url in one of my old blog post using triple dash in the markdown editor as well as the setting tab. But after saving it. I don't see anything like

This blog was originally published on xyz
How do I make it work ? Please help.

Comments

[Pacharapol Withayasakpunt]

No UI notice, but meta tag was indeed created, though.

Michael Burrows

Jul 17

Yeh, it doesn't seem to display "Originally published at" for older posts.

However if you view the source code of your article you can see the canonical URL is pointing to your website.

[Rutik Wankhade]

Oh I see. Thanks