If you want to change the admin login form logo then follow the below steps.
1. Create file admin_login.xml on app/code/Magemonkeys/AdminLogo/view/adminhtml/layout
<?xml version="1.0"?> <page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" layout="admin-login" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_configuration.xsd"> <body> <referenceBlock name="logo"> <arguments> <argument name="logo_image_src" xsi:type="string">Magemonkeys_AdminLogo::images/adminlogo.png</argument> </arguments> </referenceBlock> </body> </page>
2. Put adminlogo.png on app/code/Magemonkeys/AdminLogo/view/web/images
3. Output.