Remove the Blogger Banner + header Search

Remove the Blogger Banner

To hide the Blogger Navbar :

1- Log in to blogger

2- On your Dashboard, select Layout. This will take you to the Template tab. Click Edit HTML. Under the Edit Template section you will see you blog's HTML.

3- paste the CSS definition in the top of the template code:

...
#navbar-iframe {
  display: none !important;
}
/* Variable definitions
 ====================
  
  
  ...
Remove the code to show it again.

Step by step in video: