PDF, or Portable Document Format, is a popular format introduced by Adobe Systems in 1993. The main motivation for the adoption of the format was to replace paperwork with an electronic document. The only way to read a PDF document is through a PDF reader or viewer. The PDF viewer enables you to enjoy the many advantages of using PDF format over other formats such as Microsoft Word. One of the advantages of PDF format that a PDF reader helps you enjoy is the fact that this format leads to compact documents. The compression of large files is important in instances where you want to transfer or store large volume of files. This format is particularly advantageous in situations where you are sending emails. Another advantage of PDF documents that the PDF reader helps you enjoy is the fact that PDF files are easy and fast to create. All you need to do to convert a file into the PDF format is to click your mouse. These readers are readily available for download and some of them even come with installation CDs for other software programs where you are required to read PDF documents such as \'read me\' files and installation guides. The installation process of a PDF reader is also fairly straightforward. Yet another advantage of PDF documents that the PDF reader helps you enjoy is the added security you get. This is because all PDF files support data encryption, meaning the files will not be accessible to those they are not intended for. The PDF format also provides security in that once a file has been created, it cannot be edited. Using the PDF format ensures that the file reaches its destination clear and without any errors. Another advantage of PDF documents that the PDF reader helps you enjoy is portability. Other word processors such as Microsoft Word are OS-specific while others are hardware-specific and software-specific. This means it is possible to use a PDF reader on different computers and to view these files even on hand-held devices such as mobile phones. Yet another advantage of PDF format that a PDF reader helps you enjoy is ease of search. This simply means your PDF reader is able to quickly locate the desired content. PDF documents come with table of contents that link all sections through menus that are accessible in the software. Most PDF readers such as the easy PDF reader are free of charge. Most computers and other devices such as PDAs and mobile phones today have PDF readers and this means there is no risk of sending someone a message that they will not receive. A PDF reader includes fonts, text, images and 2D vector graphics which compose a PDF document. You could also entrench 3D objects or drawings to PDF documents. The format comes with interpreted and tokenized results of the PostScript source code. A PDF reader supports different types of patterns and it supports true graphic transparency. Other advantages of PDF format that a PDF reader helps you enjoy are the use of matrix to skew, scale, or rotate graphical elements, different page and document levels, zoom function, among others.

Ralph Goldberg is the author of this article on pdf reader. Find more information, about pdf viewer here

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