Landscape Orientation When Download Table HTML to PDF Using TableHTMLExport Plugin

I am trying to download PDF table HTML using TableHTMLExport plugin.

I can download all data in table with this code:

<table class="table downloadPDF" id="example">
        <thead>
            <tr>
                <th>Column 1</th>
                <th>Column 2</th>
                <th>Column 3</th>
                <th>Column 4</th>
                <th>Column 5</th>
                <th>Column 6</th>
                <th>Column 7</th>
                <th>Column 8</th>
                <th>Column 9</th>
                <th>Column 10</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>Value 1</td>
                <td>Value 2</td>
                <td>Value 3</td>
                <td>Value 4</td>
                <td>Value 5</td>
                <td>Value 6</td>
                <td>Value 7</td>
                <td>Value 8</td>
                <td>Value 9</td>
                <td>Value 10</td>
            </tr>
        </tbody>
    </table>
    <button id="pdf" class="btn btn-danger">TO PDF</button>

<script>
    $('#pdf').on('click', function () {
      $(".downloadPDF").tableHTMLExport({type:'pdf', filename:'tst.pdf' });
    })
</script>

But I can't see all value of column in PDF result because my columns is to many and paper orientation is portrait. How to change paper orientation to landscape when download from HTML to PDF?