Register to activate the Pro version. Code: You need to login or register to view this content. 3 Steps to Add Text/Image Watermark to PDF for Free 3 Steps to Add Text/Image Watermark to PDF for Free Step 1: Run Free PDF Watermark Download, install and launch Free PDF Watermark on your computer. Click "Add Files" button to load PDF documents. You can delete unwanted PDF files by clicking "Remove Files" or "Clean Files" button. Step 2: Customize Settings Select template from "Template List", also you can click "Settings" button and Demo 1 and Demo 2 allow you to customize text, front size, color, opacity, rotation and page range. Demo 3 enables you to add image watermark to PDF. Step 3: Add Watermark to PDF Choose destination where you save PDF files and click "Start" button to add text/image watermark to PDF for free.