LibreOffice Draw is an open source and free office suite that is not only suitable for Linux systems, but also for Windows and Mac OS X systems. LibreOffice Draw official documents state that the system will be permanently free for enterprises and individuals, and the code will be fully open.
For those who don’t have many special requirements for PDF (such as just need to edit PDF documents), then this is a good tool. But if you have high requirements for PDF tools (such as needing to edit scanned documents), then Draw may no longer be an ideal tool.
PDF Studio is a commercial software that can meet most of your needs. It can mark up PDF documents and images, and can separate or merge existing PDF files.
PDF Studio mainly includes interactive form designer, OCR, content editing, batch processing of multiple PDFs, PDF file comparison, PDF optimization and other functions. But as a commercial software, PDF Studio naturally requires payment. If you want to use its editing features, you need to pay a one-time fee of $129. Of course, you can do a free trial before buying.
You can download the software directly from the PDF Studio official website, and then enter the command "asd" in your Linux system to complete the installation.
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