EDIT LAYOUT

On the menu there are 4 submenus include "Page elements", "Fonts and Colors", "Edit HTML", and "Pick New Template"
  
Page elements

In the page elements you can set the post layout, widgets, and other.


Fonts and Colors
Option to change the color and type font

Edit HTML
Change / replace template using html code. Changing your template will discard any changes you made in Fonts & Colors. Your Page Elements will be retained.

Pick New Template
Change your template with free template by blogger.com. Changing your template will discard any changes you made in Fonts & Colors. Your Page Elements will be retained.