Document Editor · Advanced Features

SVG Watermarks

Create scalable, centered SVG watermarks that repeat behind the text on every document page.

Page background

Design an SVG watermark

Choose the watermark content and appearance. The server places the SVG behind the text in every section header.

Watermark content

Text and appearance

Presets update the text; the remaining controls tune the generated vector graphic.

SVG

Watermark text

Color

CONFIDENTIAL

Opacity 18% Angle -32° Size 58 pt

Document structure

Header-backed placement

The watermark repeats without becoming part of the editable body text.

0 SECTIONS

The page and margin dimensions are read from each section before its image location is calculated.

What this demonstrates

Use section headers as a repeating background layer

Watermarks belong to the page rather than the document text flow. A section header repeats automatically, while a fixed image placed below the text remains centered behind editable content.

Section headers

Section.HeadersAndFooters

Insert the SVG

HeaderFooter.Images.Add

Background placement

ImageInsertionMode.FixedOnPage | BelowTheText

Center on the page

Image.Location

How it works

The browser saves the current document in Internal Unicode Format and posts it together with the selected watermark settings. The server creates an SVG string, inserts it into the regular header of every section, and reloads the updated document in the editor.

FixedOnPage anchors the image to the page. BelowTheText moves it behind the main document content. The horizontal and vertical locations are calculated independently for each section from its page size, margins, and rendered SVG dimensions.

Each generated image is named tx_svg_watermark_demo. Reapplying or removing the watermark affects only images with that name, preserving other document graphics and header content.

Place the SVG behind page text

header.Images.Add(
    image,
    1,
    Point.Empty,
    ImageInsertionMode.FixedOnPage |
    ImageInsertionMode.BelowTheText);

image.Location = new Point(
    (availableWidth - image.Size.Width) / 2,
    (availableHeight - image.Size.Height) / 2);

Technique adapted from Adding SVG Watermarks to Documents.