Highlighting text is one of the most popular annotation methods, letting users emphasize essential passages and improve PDF readability. Adding a text highlight annotation to a PDF file instantly makes key information pop out, guiding readers directly to the most important sections. In this step‑by‑step tutorial, we’ll walk developers through the simple process of adding text highlight annotations to PDFs using the Java REST API and the Cloud Java SDK.

Steps to Add Text Highlight Annotation to PDF using Java REST API

1. Sign up and get your API credentials from the GroupDocs Cloud Dashboard
2. Download the GroupDocs.Annotation Cloud Java SDK and create a Java project
3. Set up your API credentials with the Configuration class
4. To annotate the PDF, initialize an AnnotateApi object
5. Create a text highlight annotation and configure its properties
6. Configure the input file information using the FileInfo class
7. Apply annotation options, such as the output file path with AnnotateOptions
8. Process the request to annotate the PDF with a text highlight annotation

Following the steps outlined above, developers can build efficient document annotator solutions and augment their workflows. One of the biggest benefits of text highlight annotations in Java is the clarity they bring to PDF documents. Be it your legal documents, reports, or academic papers, marking up the document text ascertains the focus remains on the key content. Everyone can quickly understand which document parts need attention, thus improving the user experience.

Code to Add Text Highlight Annotation to PDF using Java REST API

With just a handful of REST calls, the cloud API lets you add text‑highlight annotations to PDFs, instantly improving document readability. Java developers can embed this functionality on Windows, Linux, or macOS with minimal code and fewer API requests. As a result, end users enjoy an intuitive way to mark key passages, streamlining collaboration and knowledge sharing.