Cómo agregar fondos y capas frontales en PDFs

In this comprehensive tutorial, we explore how to enhance PDFs by adding backgrounds and overlaying foregrounds using IronPDF. The process begins with the installation of IronPDF via the NuGet package manager. After setting up the license key in the Program.cs file, we create an instance of ChromePdfRenderer to render HTML content into a PDF. We first render the main HTML content, followed by a background defined with HTML and CSS. A watermark is added as a foreground overlay using HTML headers, rotation, and opacity settings. The tutorial then demonstrates layering the foreground and background onto the main PDF, ensuring proper arrangement. The combined PDF is saved as 'background and foreground.pdf'. Further, we illustrate how to apply a background to a specific page by defining HTML with varied background colors and selectively adding backgrounds to different pages, saving the result as 'add background from page 2.pdf'. Lastly, we show how to apply backgrounds to multiple pages within a document by specifying page indexes and using the 'add background PDF to page range' method, and save the output as 'add background on multiple page.pdf'. This tutorial offers a detailed walkthrough for effectively managing PDF backgrounds and overlays, highlighting the versatility of IronPDF.