Remove Theme Credits
Log in to the Tumblr website. Click on the “Customize” button on the right sidebar of your Tumblr Dashboard. Click the “Edit HTML” link to open the HTML code for your current theme. Locate the text you’d like to remove form your blog. For example, press “Ctrl-F” and then enter “Theme by” into the Search For field. Delete the surrounding code beginning with the opening <div tag and ending with the closing
