The Original Visual Apothecary and Graphic Emporium, Established 1996.
Download the zip file of backgrounds you want to use and unzip it.
Log into your Blogger account.
Click the “Design” link for the blog you want to add a background to.
On the top of the page on the left is a list of links. Click on “Background”, right underneath “Templates”.
You will get a little box to the right showing the background you currently have. Click the little down arrow to the right of it. A screen pops up with a bunch of Blogger’s pre-installed backgrounds. Right under “Select Background Image” there is an option to “Upload Image.” Click that.
“Choose File” will allow you to navigate to the file on your computer.
Select that file and select “Choose” or “Open” depending on your browser. Blogger installs that file. It shows you how it will look. If you like the way it looks, hit “Done.” If not, you can repeat the process with different backgrounds.
After you are done, select “Apply to Blog,” which is the orange button at the very top of the webpage.