<div class="Masthead Masthead--arrows">

    <div class="Masthead-secondary">
        <div class="Nextprev">
            <a rel="prev" class="Nextprev-link" href=""><img src="/assets/img/icons/icon-arrow-circle-left.svg" alt="Previous"></a>
            <a rel="next" class="Nextprev-link" href=""><img src="/assets/img/icons/icon-arrow-circle-right.svg" alt="Next"></a>
        </div>
        <!--/.Nextprev-->
    </div>
    <!--/.Masthead-secondary-->

    <div class="Masthead-primary">

        <h1 class="Heading Heading--secondary">Dedicated to advancing the practice of design</h1>

    </div>
    <!--/.Masthead-primary-->

</div>
<!--/.Masthead-->
<div class="Masthead{% if mastheadModifier %} Masthead{{ mastheadModifier }}{% endif %}">

    {% if "--arrows" in mastheadModifier or "--combo" in mastheadModifier %}

    <div class="Masthead-secondary">
        {% include '@next-prev' %}
    </div><!--/.Masthead-secondary-->

    {% endif %}

    <div class="Masthead-primary">

        {% if mastheadBreadcrumb %}{% include '@breadcrumb' %}{% endif %}

        {% if mastheadContext %}
        <div class="Masthead-context">
            <p class="Heading Heading--context{% if mastheadHeadingModifer %} Heading{{ mastheadHeadingModifer }}{% endif %}">{{ mastheadContext }}</p>
        </div>
        {% endif %}

        <h1 class="Heading{% if '--arrows' in mastheadModifier or '--combo' in mastheadModifier %} Heading--secondary{% else %} Heading--main{% endif %}{% if mastheadHeadingModifer %} Heading{{ mastheadHeadingModifer }}{% endif %}">{{ mastheadTitle }}</h1>

        {% if mastheadHasSelector %}{% include '@selector' %}{% endif %}

        {% if mastheadSub %}<p class="Masthead-sub Heading Heading--context{% if mastheadHeadingModifer %} Heading{{ mastheadHeadingModifer }}{% endif %}">{{ mastheadSub }}</p>{% endif %}

    </div><!--/.Masthead-primary-->

    {% if "--combo" in mastheadModifier %}

    <div class="Masthead-third">
        <div class="Heading Heading--context">
                {{ mastheadThirdHeading }}
        </div>
        {{ mastheadThird }}
    </div><!--/.Masthead-third-->

    {% endif %}

</div><!--/.Masthead-->
{
  "mastheadTitle": "Dedicated to advancing the practice of design",
  "mastheadModifier": "--arrows"
}

Chimney is taller to make space for the chimneys in Layout Alternate.