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

<template name="layoutChooser">
    <div class="layoutChooser pull-right dropdown-menu" role="menu">
        <table>
            <tr>
                <td></td>
                <td></td>
                <td></td>
            </tr>
            <tr>
                <td></td>
                <td></td>
                <td></td>
            </tr>
            <tr>
                <td></td>
                <td></td>
                <td></td>
            </tr>
        </table>
    </div>
</template>