ot_typo3/ot_templating/Resources/Private/Layouts/Modern/3Col.html

<f:comment><!-- base layout for a page, with header, carousel, navbar, breadcrumb and footer --></f:comment>
<f:layout name="3Col" />

<div class="t-container st-effect-3">
    <div class="wrapper">

        <f:comment><!-- Render the header defined in partials/Header.html--></f:comment>
        <f:render partial="Modern/Header" arguments="{_all}" />

        <f:comment><!-- Render content --></f:comment>
        <section class="page-section-ptb">
            <div class="container">
                <div class="row">
                    <div class="col-sm-12 mt-30">
                        <f:comment><!-- render the content of the content section (middle column) --></f:comment>
                        <f:render section="Content" />

                        <f:comment><!-- render the content of the leftcol section (left column) --></f:comment>
                        <f:render section="Leftcol" />

                        <f:comment><!-- render the content of the rightcol section (right column) --></f:comment>
                        <f:render section="Rightcol" />
                    </div>
                </div>
            </div>
        </section>

        <f:comment><!-- Render the footer defined in partials/footer.html--></f:comment>
        <f:render partial="Modern/Footer" />
    </div>
</div>