ohif-viewer/Packages/ohif-viewerbase/client/components/viewer/layoutButton/layoutButton.html

<template name="layoutButton">
    <div id="{{this.id}}"
        class="toolbarSectionButton rp-x-1 {{this.classes}} {{activeClass}} js-dropdown-toggle"
        title="{{this.title}}"
        data-target="#layoutChooser"
    >
        <div class="svgContainer">
            {{#if this.svgLink}}
                <svg>
                    <use xlink:href={{absoluteUrl this.svgLink}}></use>
                </svg>
            {{else}}
                <i class={{iconClasses}}></i>
            {{/if}}
        </div>
        <div class="buttonLabel">
            {{this.title}}
        </div>
    </div>
</template>