There’s a great little plugin called Add Logo to Admin by c.bavota which does a great job at letting you add your own logo to the WordPress login screen, and even to the top of your dashboard. But it’s another plugin.
If you’re building a theme for a client and simply want to replace the generic WordPress image, you can do that with just a few lines of code. Place them in your theme’s functions.php file:
//Change the generic login image function custom_login_logo() { echo ''; } add_action('login_head', 'custom_login_logo');
Discovered in Jo Lowery’s excellent course Dreamweaver and WordPress Core Concepts at Lynda.com.