How to remove Blogger Navbar

Go to a Dashboard -> Settings -> Design -> Edit HTML
In a code find a Template Style and add

#navbar-iframe {
   display: none !important;
}


For example:

<b:skin><![CDATA[/*
-----------------------------------------------
Blogger Template Style
Name:     Simple
Designer: Josh Peterson
URL:      www.noaesthetic.com
----------------------------------------------- */
#navbar-iframe {
   display: none !important;
}
/* Variable definitions
   ====================
   <Variable name="keycolor" description="Main Color" type="color" default="#66bbdd" value="#cc6611"/>