thank you.

try this code

#wpforo #wpforo-wrap {background: transparent !important;}
#wpforo #wpforo-wrap .wpf-breadcrumb div {background: #fff;}
#wpforo #wpforo-wrap .topic-wrap {background: #fff;}
#wpforo #wpforo-wrap .forum-wrap {background: #fff;margin-bottom: 5px;padding: 0 5px;}
#wpforo #wpforo-wrap .post-wrap {background: #fff;}

add it to custom css
Dashboard > wpForo > Settings > Colors & Styles > Custom CSS

that's what I did, but did not change the space between categories.

Is there anything missing in this code?

#wpforo #wpforo-wrap .wpforo-content .wpforo-section ~ .wpforo-section {
margin-top:
50px;
}

All custom css goes to your THEME's Additional CSS space in customizer.

Macky hatte mir diesen code gegeben, der aber nichts aendert. 

Hier ist meine seite:  Ai-talk und direct ueber jedem Category image a  separation von 30 or?? px, wie er es auf seiner Seite hat. 

I wrote in German, since I believe you are Germany based.  I left 42 years ago. If you can tell how? and where to implement the code. in CSS of theme, or htaccess, or?? would be helpful.

thanks - danke  - gracias

Holger

I guess you are down-under, as they say.

No, uk, I just say mate a lot it seems lol 

My post here gets constant the bad newbie hacks, 

be well

#wpforo #wpforo-wrap .wpforo-content .wpforo-section ~ .wpforo-section {
margin-top: 30px;
}

change the 30px to whatever you need and it should work mate. But Tutrix will know what to do :) 

I added it in the wordpress CSS, but did not change anything.

Did I need to go in server files with htaccess?  since in WPForo is nowhere a CSS box

@tutrix is the man when it comes to customising the forum mate. He gave me all the code, definitely check out this forum: https://www.tutrix.de/forum/

But here is some code that might help do what you need: