How to Insert Background Image in Single Blog Post, Blogging Features
Go to your blogger blog.
Click on New Post.
Go to top left corner, change to HTML View.
Paste the below given code.
Change the image url.
You are done!
<style>
body {
background-image: url('https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgAIXDZF6OMBH-MzNG8wIpG8-OfjnqBhWWcKrQ-LmkfIOfaSj4jzRnNQnM8vgH-PLdpnbMLpHdc5-Bd8WPeLleR6KyUDXbaqgG5ZSfOZBxP8t1HU6N0Cb5hWLArU-gkq30jSQYrYMTLqgLgMPx28yuh8F7XUjfgewYcnyXaBaDD97YkrP7OvXVSYUNB/s1600/Mason%20Carter%20%282%29.jpg');
}
</style> Your_code_is_here Your_code_is_here
Result