I have several blogs in which I write about different topics. It would be nice if, when I’m commenting on a blog to which I don’t have access, I could select which of my own blogs to link to, rather than always linking to my primary blog.
You can change the blog linked to your username here > Dashboard -> Users -> Personal Settings -> then scroll down to ‘Account Details’. In the spot where it says ‘website’ fill in the URL of your selected blog and save the changes. Do note that switching back and forth will requires you changing the URL each time you choose to change your username link.