Hello, I want to redefine the position "left" in superposition on 2 other positions (Partial overlay on slideshow and the next position used, section-project in my use)

I have not found the place to put a code of this type, thanks for your help

.left {
position: absolute;
top: 80%;
left : 10%;
width: 200px;
height: 400px;
background: #808080;
}

You can add new position in template index.php, and put above code in file templates/jf_thehub/css/template.css.

joomfreak