MyBB Community Forums

After BootBB updates the theme, how do I keep the changes to the old version of global.css?

If you make changes to global.css, you need to reapply them every time you update the theme. For my forum I have found that the easiest is to not make changes throughout the css file, but to add them at the end. So I just copy a block of css rules at the end after each update. Because the custom rules are at the end, they override the rules above.