- Login to Blogger.com
- Click on "Template".
- Click on "Customize". Now Template Designer page will open.
- Click on "Background".
- Click on picture under background image.
- Categories will open , select the picture you want to upload.
- Click "Done".
- Click on "Apply to Blog.
How To Add an Image to Blogger Template ?in: Blogger
You can not only customize color, font, width of your template but also you can set a background image for your blogger blog.
How To Add an Image to Blogger Template?