com.aspose.words

Example:

Document doc = new Document();

// Add a plain text watermark.
doc.getWatermark().setText("Aspose Watermark");

// If we wish to edit the text formatting using it as a watermark,
// we can do so by passing a TextWatermarkOptions object when creating the watermark.
TextWatermarkOptions textWatermarkOptions = new TextWatermarkOptions();
textWatermarkOptions.setFontFamily("Arial");
textWatermarkOptions.setFontSize(36f);
textWatermarkOptions.setColor(Color.BLACK);
textWatermarkOptions.setLayout(WatermarkLayout.DIAGONAL);
textWatermarkOptions.isSemitrasparent(false);

doc.getWatermark().setText("Aspose Watermark", textWatermarkOptions);

doc.save(getArtifactsDir() + "Document.TextWatermark.docx");

// We can remove a watermark from a document like this.
if (doc.getWatermark().getType() == WatermarkType.TEXT)
    doc.getWatermark().remove();