Hello Florian,

You have two ways of doing this:

1. with css, you can add

div#project-nav {
    display: none;
}

#main-page-content.project-page {
    margin-bottom: auto;
}

in customizer -> additional CSS

2. by modifying the code and removing the section. You can do this in in single-manifesto_portfolio.php, remove line 33

https://prnt.sc/de08Q_uRnchq