The single link button is intended to make it easier for writers to link to previous posts and external content.
It adds a standard hyperlink to the body of the post.
By default, it is set to search both your site and the Web.
To use it, simply 1) highlight the term you would like to add a link to. 2) Press the Single Link button.
You can then choose the post you would like to link to from the list. If you don't see the item you want, you can try a different search term.
If you want to link to something outside your site, click web for a general web search.
If you link to something on your site, currently that will be automatically added to the Related section. We will be deprecating this auto-Related adding functionality in the near future.