PDF Studio is a commercial PDF editor from Qoppa Software that has all the necessary editing features.
In case you’re curious, we also have a detailed article on how to edit PDF files using LibreOffice Draw. It may not be a full-fledged PDF editor and comes with some limitations but it’s worth trying out. If your requirements are limited and mostly text editing in a PDF document, Draw will serve your purpose.
LibreOffice draw provides a handy way of editing a PDF file. Just to be clear, I’ve tested this on Pop OS 20.04, but you can easily try them on other Linux distributions as well. Best PDF editors for Linux for editing the content of the PDF files Such applications are duly marked non-FOSS so that you can make a decision yourself. They are listed here because they are available on Linux and the article’s focus is on Linux. Some applications mentioned here are not open source.