Manually add watermark for printing

Technical Support
13

Okay here’s what I have done to solve this:

instance.iframeWindow.addEventListener("visibilityChanged", (event) => {
  if (event.detail.element === "printModal") {
    if (event.detail.isVisible) {
      // Draw diagonal watermark in middle of the document
      documentViewer.setWatermark({
        diagonal: {
          fontSize: 55,
          fontFamily: 'sans-serif',
          color: 'red',
          opacity: 40,
          text: 'Custom watermark text'
        }
      })
    } else {
      // Clear the watermark
      documentViewer.setWatermark({})
    }
  }
})