Annotate PDFs Online Using pdfFiller on Linux For Free

Evince (or Document Viewer), the default pdf viewer as of Ubuntu 18.04 also supports highlighting and annotations. To show the annotations menu bar, you must click on the red circle (see below). The annotation options appear and you can annotate or highlight as seen in the blue circle in the image below.

Fortunately, Linux offers various tools to help you edit PDF files, and one such tool is PDFedit. PDFedit is an open-source PDF editing application specifically designed for Linux systems. It provides a range of features to manipulate PDF files, allowing you to modify text, add images, annotate, and more.

PDF annotation on Linux using Evince. Find the PDF file you want to annotate and open it in Evince. Once the PDF is loaded in Evince, click the Thumbnails dropdown arrow on the upper left corner. A menu of options will appear, and you will need to choose the Annotations option.

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Step 1 Locate the target PDF file in your Linux and open it in Evince. Once the PDF is loaded in Evince, proceed to the upper-left and click the "Thumbnails" drop-down arrow. Step 2 From the options displayed, choose "Annotations," and you should see a list of annotations available for your PDF file.

You can annotate and markup your PDF files with Xodo, a free online PDF annotator. Simply upload a PDF from your local drive or cloud storage. Then use the available tools to insert text, add notes, images, highlights, and more. Once done, click on the Download button to save the PDF to your device or cloud storage.

You can choose from PDFtk Server, PDFtk free, and PDFtk Pro. PDFtk allows use to edit your PDF in several different ways using the Linux command line.