Allows you to check if a particular Acrobat or PDF version is used in the PDF.
There is a difference between the version number of the PDF standard used by the document and the version number of Adobe Acrobat with which the document is compatible. For example, PDF 1.3 is supported by Adobe Acrobat 4.x and later. The Acrobat version is the sum of the two numbers that make up the PDF version, for example: PDF 1.7 = Acrobat 8.
If a PDF document uses an Adobe Acrobat or PDF version that is higher than supported by your workflow, problems may occur. For this reason, you should consider using versions which are earlier than the most recent one for documents that will be widely distributed.