The login.jsp file gives you the credential frame with the login prompts in an iframe. It has no branding header. If you use this page, you need to write the HTML code for the header and the branding.
Modify the login.jsp file to add the custom branding and any other content you require.
For information about how to modify a file, see Modifying Configurations.
Modify the credentials. See Customizing the Credential Frame.
Continue with Using Properties to Specify the Login Page.