The admin(s) can change the backgrounds of the pages via Studio->Pages->Settings of every page. If you mean the possibility to change the backgrounds by the users - then yes, by default it's not possible.
Then it's better to upload your image via the Studio->Storage->Images area, copy its URL, and write it in the Custom Styles area of your template, for example like:
Hello @Al Barnes !
The admin(s) can change the backgrounds of the pages via Studio->Pages->Settings of every page. If you mean the possibility to change the backgrounds by the users - then yes, by default it's not possible.
A
I want to have backgrounds on the home page , the whole screen not just a banner
Then it's better to upload your image via the Studio->Storage->Images area, copy its URL, and write it in the Custom Styles area of your template, for example like:
#bx-content-wrapper {background-image: url('[the copied URL]');
}