Master PDF Editor is one of the simplest tool used for editing of pdf documents. This is a multi-functional tool with straightforward in its working. It is available for Windows, Linux, and macOS. Even, a person with zero knowledge about it can use it easily. It provides you with all the features like viewing, creating, editing and merging pdf files which you might want. With this, you can also sign, scan and print pdf documents. It comes with OCR technology. Moreover, the annotation tools such as a sticky note, measuring tools and shapes make this a very useful tool. This will also allow bookmarking your PDF documents.