Let's talk about background image, on our template we don't add background image from CSS file, all of them are editable from page editor. Which will be much easier to do rather than changing from CSS file.
In this article
How to change background image
1. Open your page editor
2. Click the 'cube' icon on the left side of the screen, and you'll see an image module that usually we give a label 'Background Image(resolution X resolution)'.
3. Click that particular module to change the background image, then change the image
4. View on the preview screen and you will see that the background image already added.
5. Click Save and Publish the template