firefly-iii/resources/views/partials/page-header.twig

<h1>
    {% if mainTitleIcon %}
        <i class="hidden-xs fa {{ mainTitleIcon }}"></i>
    {% endif %}
    {{ title }}
    {% if subTitle %}
        <small id="subTitle">
            {% if subTitleIcon %}
                <i class="hidden-xs fa {{ subTitleIcon }}"></i>
            {% endif %}
            {{ subTitle }}
        </small>
    {% endif %}
        <span class="visible-xs-inline">xs</span>
        <span class="visible-sm-inline">sm</span>
        <span class="visible-md-inline">md</span>
        <span class="visible-lg-inline">lg</span>
</h1>