messages.toolbar.zoom.zoomIn String (default: "Zoom In")

To run the below example, open it in Dojo

Example - set custom text for Zoom In message

<div id="pdfviewer"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.2.2/pdf.js"></script>
<script>
  window.pdfjsLib.GlobalWorkerOptions.workerSrc = 'https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.2.2/pdf.worker.js';
</script>
<script>
  $("#pdfviewer").kendoPDFViewer({
    pdfjsProcessing: {
      file: "https://demos.telerik.com/kendo-ui/content/web/pdfViewer/sample.pdf"
    },
    messages: {
      toolbar: {
        zoom: {
          zoomIn: "Custom Zoom In Message"                  
        }
      }
    }
  });
</script>