How to have a the same image as the background perminantly - Squarespace 7.1
Step 1:
Go to Custom CSS and copy the below code into the CSS editor
Step 2:
Within Custom CSS - click on “Custom Files” and Upload your background image here
Step 3:
Now click on that file / image and it’ll give you a static URL.
Step 4:
Now take that URL and replace the “Background Image” link that you see within this code - on line 3 - within the quote marks.
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Note:
Don’t add any background images to any sections - leave this blank to let the image kick through.
Want to see a live demo of this, check out Melody of War website we built.
//SINGLE BACKGROUND IMAGE
  body::before {
    background-image: url('ADD YOUR IMAGE LINK HERE');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    content: '';
    height: 100%;
    position: fixed;
    opacity: 1;
    left: 0;
    top: 0;
    width: 100%;
    z-index: -10;
  }
  
    .page-section,
  .page-section .section-background, .section-border {
    background-color: hsla(0, 0%, 0%, 0) !important;
  }