Thanks to the technology of computers, many documents can be formed digitizedly. Documents used in all fields of work are made in digital forms or files, which makes it easier to be edited. Official matters are the most common field that applies this kind of documents into the daily activities. Whether or not the documents are saved in excel or word file, the documents are converted into PDF format at last. So, it would be better if you are familiar with PDF editor aside from PDF reader.
Without a specific, specialized application, editing PDF file is somewhat difficult. As a result, those who want to manipulate any content on their already-fixed PDF file should use a so-called PDF editor. These days, there is a big array of PDF editor applications designed by various developers. Of them all, the most number is for a PDF editor used in Windows. But do not worry if you are now using Mac Operating System because there is still PDF editor application for Mac, although it is not available in a big number.