Hi, it's me again.
So my problem today is my background image for my wiki. I'd like to resize it but doing it on Paint is impossible and that's all I have. So I was wondering if I could resize it with MediaWiki:Wikia.css and how.
A preview of the problem: https://mechants-fr.fandom.com/fr/wiki/Wiki_M%C3%A9chants_Fr.
Thanks in advance.
It appears that the background image was created from multiple images using an image editor. It would be better just to re-create the image if you can. If you do so, make sure it isn't as wide as the current version. The current version has a lot of empty space in the middle. You could probably make that section smaller.
I have uploaded this version of the background image which I created using Microsoft PowerPoint. You can download it and then re-upload it as the wiki background using ThemeDesigner. It should be large enough to get the "no split" option.