How to change template using template designer

1. First login to blogger in draft.

2.At your dashboard, go to LAYOUT -> TEMPLATE DESIGNER

3. It will redirected you to below page. Here you can see Templates, Background, Layout and Advance from the left side bar menu.

4.  Under templates,  you may change your template design. Just select any new design and it will automatically run live show of your new selected tempate. You can select from out of 15 new, highly-customizable templates.

Example :
                         Before                                                            After

If you happy with  your new template, just click APPLY TO BLOG

You will have new look of your blog!