Insert watermark

Inserts or removes a custom watermark on every page of the document.

(function () {
  let doc = Api.GetDocument();
  let action = "insert"; // Change to "remove" to delete watermark

  if (action === "insert") {
    let watermarkSettings = doc.GetWatermarkSettings();

    watermarkSettings.SetType("text");
    watermarkSettings.SetText("Example Watermark");

    let textProperties = watermarkSettings.GetTextPr();
    textProperties.SetFontFamily("Calibri");
    textProperties.SetFontSize(48);
    textProperties.SetDoubleStrikeout(true);
    textProperties.SetItalic(true);
    textProperties.SetBold(true);
    textProperties.SetUnderline(true);
    textProperties.SetColor(0, 255, 0, false);
    textProperties.SetHighlight("blue");

    watermarkSettings.SetTextPr(textProperties);
    doc.SetWatermarkSettings(watermarkSettings);
  } else if (action === "remove") {
    doc.RemoveWatermark();
  }
})();

Methods used: GetDocument, GetWatermarkSettings, SetType, SetText, GetTextPr, SetFontFamily, SetFontSize, SetDoubleStrikeout, SetItalic, SetBold, SetUnderline, SetColor, SetHighlight, SetTextPr, SetWatermarkSettings, RemoveWatermark

Result