Demo - Frozen Rows and Columns

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdn.grapecity.com/wijmo/5.latest/styles/wijmo.min.css">
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.grid.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.pdf.min.js"></script>
<script src="https://cdn.grapecity.com/wijmo/5.latest/controls/wijmo.grid.pdf.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/lz-string/1.4.4/lz-string.min.js"></script>
<br/>
<br/>
<br/>
<div class="container">
  <div id="theGrid"></div>

  <button id="export" class="btn btn-default">
    Export to PDF
  </button>
</div>

CSS

.wj-flexgrid {
  max-height: 250px; 
  margin: 10px 0;
}
body {
  margin-bottom: 20px;
}

/* style frozen cells */
.wj-cell.wj-frozen:not(.wj-header):not(.wj-group):not(.wj-state-selected):not(.wj-state-multi-selected),
.wj-cell.wj-frozen.wj-alt:not(.wj-header):not(.wj-group):not(.wj-state-selected):not(.wj-state-multi-selected) {
  background: rgb(255,255,125);
}

.wj-flexgrid .wj-cell.wj-frozen-col {
    z-index: 0;
}

JavaScript

onload = function () {
  document.getElementById("export").addEventListener("click", e => {
  		 var pdf = wijmo.pdf;
       var gridPdf = wijmo.grid.pdf;
       var pdf_name = 'Test Test Test Test Test Test Test \nTest Test Test Test Test Test \nTest Test Test Test Test Test Test  \n';
       let doc = new pdf.PdfDocument({
            ended: (sender, args) => pdf.saveBlob(args.blob, 'FlexGrid.pdf'),
            footer: {
                declarative: {
                    text: pdf_name + '\t&[Page]\\&[Pages]'
                }
            },
        });
        doc.end();
    });
  

}