Sticky and less high menu

I want to make the menu sticky, and not so high because I think that too much space is lost.

Regarding menu height you can add to your custom.css this code

.t3-header {
padding-bottom:16px!important;
}

Regarding sticky menu , you want to be sticky only menu or also the bar below it ?

only menu please

Edit this file /templates/ja_directory/tpls/blocks/header.php and change from :

<header id="t3-header" class="wrap t3-header <?php if ($headright): ?>ja-lang<?php endif ?>">

To:

<header id="t3-header" class="wrap t3-header affix <?php if ($headright): ?>ja-lang<?php endif ?>">

Add to your custom.css this :

.t3-header.affix{
position: fixed;
top:0px;
width:100%!important;
}
.t3-subnav{
margin-top:100px;
}

Regards

excellent, thank you!!!