Hello,
I have a problem here my forum is small when I look at it on the index I would like to take the full width of the page.

How to do what code I will be able to enter in the CSS

See here https://perso-blog.fr/buisness-strategie/forums/

[@cgauthey Participant 4 years, 6 months ago]

While when we look here the display is not the same is I would like this display here https://perso-blog.fr/buisness-strategie/forums/forum/moderation-a-lire-avant-de -to post/

Either the same as on the forum index

[@robin-w Moderator 4 years, 6 months ago]

your theme or elementor is doing this

it has a css entry

.has-sidebar:not(.error404) #primary {
	float: left;
	width: 58%;
}

you could change this to 100% in your custom css ie put this in your custom css

.has-sidebar:not(.error404) #primary {
	width: 100% !important;
}

but it might affect other parts of your site, so try it and see