Hello, I finalized my "ShowHide only right panel" extension. I use only one JS function and 1 cookie. Here the code and instruction if you want (like you show me your xar :-) ) --------------------------- To use it: - you must add this html code in a page (in footer by example) {{html}} <label id="BtnSHPanel" class="btn" onclick="ShowHidePanel('#rightPanels',90)" title="Replier/Déplier le panel de droite">&#8644;</label> {{/html}} - add JS Cookie function (Cookie.xar) - and replace this line in template (or use xwiki object): ./templates/rightpanels.vm <$bodyTagName id="body" class="skin-flamingo wiki-${xcontext.database} space-${escapetool.xml($doc.space.replaceAll(' ', '_'))} ${bodyAction}body #if($showLeftPanels == "0" || $!request.getCookie('CkPanelhidden'))hideleft#end#if($showRightPanels == "0" || $!request.getCookie("CkPanelhidden"))hideright#end#if($hidecolumns && ($!hidecolumns == 1))hidelefthideright#end #if($showLeftPanels != "0" && $showRightPanels != "0" && $!hidecolumns != 1)content#end panel-left-width-${leftPanelsWidth} panel-right-width-${rightPanelsWidth}"> ./skins/flamingo/htmlheader.vm #if($showRightPanels == "1" || $request.getParameter("forceRightPanels") || $!request.getCookie("CkPanelhidden")) <div id="rightPanels" class="panels right panel-width-$!{rightPanelsWidth}"#if(($showRightPanels != "1" && $request.getParameter("forceRightPanels")) || $!request.getCookie("CkPanelhidden"))) style="display: none;"#end> #set($panelUixs = $services.uix.getExtensions('platform.panels.rightPanels')) --------------------------- My JS function: ---------- function ShowHidePanel(VarPanelId, day) { //Show or Hide panel depend of cookie var PHidden = readCookie('CkPanelhidden'); require(['jquery'], function ($) { if (!PHidden) { //Hide the panel and save state in a cookie $('#xwikicontent').append("<p>Debug Hide Panel:VarPanelId "+VarPanelId+"</p>"); createCookie('CkPanelhidden',true,day); $(VarPanelId).slideUp(0); } $('#body').toggleClass('hideleft hidelefthideright'); $('#contentcontainer').toggleClass('hideleft hidelefthideright'); if (PHidden) { //Show the panel and delete the cookie eraseCookie('CkPanelhidden'); $(VarPanelId).slideDown(0); } }); }---------- (xwiki users list in copy if interested) Pascal BASTIEN ________________________________ De : Paul-Catalin Cojan &lt;paul.cojan(a)xwiki.com&gt; À : Pascal BASTIEN &lt;pbasnews-xwiki(a)yahoo.fr&gt; Envoyé le : Mardi 4 novembre 2014 17h21 Objet : Re: [xwiki-devs] [Contrib] Hide-Show Panels extension Hello, I attached the xar. On Tue, Nov 4, 2014 at 5:59 PM, Pascal BASTIEN &lt;pbasnews-xwiki(a)yahoo.fr&gt; wrote: Hello, github. The name