Creating a custom image for your blog header requires tools and expertise that are — as my college professors would say when I asked a question they didn’t want to answer — “beyond the scope of this text.” But if you already have the image you want to use, adding it to your Thesis theme is a breeze. Follow these steps and you’ll have it done in just a few minutes.
Upload your image onto your server in this directory:
Login to your Dashboard.
Click on Appearance>Thesis Openhook in the left sidebar.
Scroll down to the field labeled Header. In this field, insert the following code with the two specified changes:
<a href="http://yourdomainname"><img src="http://yourdomainname/wp-content/themes/thesis/custom/images/yourfilename" alt="" /></a>
yourdomainname = the URL to your site (such as www.win-with-1.com)
yourfilename = the name you gave to your header image (such as logo.png)
Click the checkbox next to Remove Thesis default header.