How can I change the header image link to anothers ?

my clean blog for troubleshooting:
https://kayblogfortesting.blogspot.jp/


I already changed the header image ( the white background with a number ),
it will bring me to homepage.

*However, I would like to know how can I link to another site when I click 
the header image ?*

Thanks a lot....

-- 
You received this message because you are subscribed to the Google Groups "Blogger Developer Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/bloggerdev.
For more options, visit https://groups.google.com/d/optout.