To set Unsubscribe URL using HTML Editor, use this Unsubscribe URL merge tag:
{{unsubscribe_url}}
The HTML code should be this:
<a href="{{unsubscribe_url}}">Click to Unsubscribe</a>
Here is an example on how to set Unsubscribe URL using HTML Editor:
![Setting the unsubscribe url merge tag in Compose email of HTML Editor](https://mailbluster.com/wp-content/uploads/2024/01/HTML-Editor.png)