How to watermark a DOCX or RTF document in a .NET application

2021-12-06

Watermark exports to .DOCX and .RTF files have been added in FastReport .NET. limitation - the sign cannot be positioned above the text.

A watermark is a text or image (mostly semi-transparent) that is superimposed so that it does not interfere with viewing the document. It is used to protect the content of documents from commercial use by non-owners or fraud.

Example of a document with a watermark:

Sample document with a watermark

Add watermarking from a code:

//Create instance of class Report
Report report = new Report(); 
//Create report page
ReportPage pageBase = new ReportPage();
//Add text watermark
pageBase.Watermark.Enabled = true;
pageBase.Watermark.Text = "Watermark";
//Add created page to report page collection
report.Pages.Add(pageBase);

The result of adding a watermark in the preview:

Watermark in a preview

Result of exporting a watermarked report to RTF:

Watermark in RTF

The result of exporting a watermarked report to Word 2007:

Watermark in DOCX

These improvements will help protect your reports from unwanted use.

.NET Export FastReport RTF Word .NET Export FastReport RTF Word
September 21, 2026

How to Configure an AI Agent for FastReport .NET: Architecture, Limitations, and Report Migration

AI feature for FastReport .NET: automated migration of reports from Crystal Reports and StimulSoft, refactoring for .NET 8/9, template generation, and protection against data leaks.
September 08, 2026

Answers to Frequently Asked Questions about the FP3 Format

We'll break down 11 common questions about the FP3 format: what these files are, how they differ from FR3 files, which programs can open them, and how to convert them to PDF.
September 04, 2026

How to export a report from FastReport .NET to DXF

In this article, we will consider methods of exporting a report to the DXF format, and also see what the resulting output looks like after opening the file in a CAD application.

© 1998-2026 Fast Reports Inc.