It’s Ok, thank you Guenni007. I’ve found where the CSS code should be changed.
To help people who have the same problem, you have to add these lines in Quick CSS or custom CSS (to have exactly the same special heading H1 as H3 special heading) :

h1 {
font-size: 20px;
line-height: 1.1em;
margin-bottom: 8px;
}

.av-special-heading-h1 .special-heading-border{height: 1.9em}

.template-page .entry-content-wrapper h1{text-transform: none;letter-spacing: 0px}

Cheers !
Franck

Hi,
Thanks for your reply Josue !
I have done what you say (changed the heading type to H1, then resized H1 like H3 in the Advanced Style Editor), but there are differences with the H3 style again :

H1 (with resizing) :
http://www.sphere-evenements.com/avec-h1-en-capital.jpg

H3 :
http://www.sphere-evenements.com/avec-h3.jpg

– How can I remove Upper-case ?
– How can I center the line after the title ? and reduce the gap between the title and the text ?

Thanks for your help !

Best regards,
Franck

Hi !
Ok thank you, I understand.
So, could you help me to adjust CSS code of this static menu please ? http://www.sphere-evenements.com/menu-gauche-enfold-static.jpg
Thank you,
Best regards,
Franck

Here it is my code for the sidebar menu of this page :

<aside class="sidebar sidebar_left  three alpha units" role="complementary" itemscope="itemscope" itemtype="https://schema.org/WPSideBar"><div class="inner_sidebar extralight-border"><section id="nav_menu-3" class="widget clearfix widget_nav_menu"><div class="menu-menu-test-barre-laterale-container"><ul id="menu-menu-test-barre-laterale" class="menu"><li id="menu-item-2141" class="menu-item menu-item-type-post_type menu-item-object-page current-menu-item page_item page-item-1057 current_page_item menu-item-has-children menu-item-2141"><a href="http://localhost/wordpress/agence-evenementielle-paris-et-ile-de-france/">Agence événementielle Paris et Ile de France</a>
<ul class="sub-menu">
	<li id="menu-item-2133" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-2133"><a href="http://localhost/wordpress/cluedo-geant/">Animation Cluedo géant</a>
	<ul class="sub-menu">
		<li id="menu-item-2135" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2135"><a href="http://localhost/wordpress/petit-dejeuner-d-entreprise/">Petit déjeuner d’entreprise</a></li>
	</ul>
</li>
	<li id="menu-item-2136" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2136"><a href="http://localhost/wordpress/soiree-de-fin-annee-entreprise/">Soirée de fin d’année d’entreprise</a></li>
	<li id="menu-item-2137" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2137"><a href="http://localhost/wordpress/soiree-a-theme/">Soirée à thème</a></li>
	<li id="menu-item-2138" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2138"><a href="http://localhost/wordpress/garden-party/">Garden-party</a></li>
	<li id="menu-item-2139" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2139"><a href="http://localhost/wordpress/soiree-casino/">Soirée casino</a></li>
	<li id="menu-item-2140" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2140"><a href="http://localhost/wordpress/cocktail-dinatoire/">Cocktail dinatoire</a></li>
	<li id="menu-item-2142" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2142"><a href="http://localhost/wordpress/arbre-de-noel-ce/">Arbre de Noël CE</a></li>
</ul>
</li>
<li id="menu-item-2159" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-2159"><a href="http://localhost/wordpress/mariage/">Organisation Mariage</a></li>
</ul></div><span class="seperator extralight-border"></span></section></div></aside>

Hey Yigit,
You can see my menu here : http://www.sphere-evenements.com/menu-gauche-enfold.jpg

As you can see, there is no bullet point in front of my categories. Also, my menu is not aligned at left but at right (sub-categories are shifted to the left, when yours are shifted to the right).

However, in your screenshot, all levels of your menu have the same CSS (bold, color). I’d like to differentiate each level with CSS but I don’t know how.

Then, I’d like to replace the bullet point by an image or something else than a point. Is it possible ?

Thanks for your help :)

Franck

I work in local mode so I can’t post the link of the page wich there is the menu :(
But my menu seems like this one : http://kriesi.at/themes/enfold/pages/

I ‘d like to have a kind of mega menu in my sidebar like this :

* PAGE 1 CATEGORY
page on subject 1
page on subject 2
page on subject 3
* PAGE 2 CATEGORY
* PAGE 3 CATEGORY

I’d like to change default font, font weight, and maybe add a illustration before the title of de page category

Thank you Yigit
Franck

Thanks for your help Devin ! I’ll take a look to this plugin tomorrow.

Best regards,
Franck