Layout Page Builder

Hi there,

That is one of our newest feature in the premium plugin:
https://docs.generatepress.com/article/layout-element-overview/#container

Or you can try some CSS.
– Full width:

.site.container.grid-container {
    max-width: 100%;
}

– Contained:

.inside-article {
    padding: 0;
}

Adding CSS: https://docs.generatepress.com/article/adding-css/

Let me know if this helps 🙂