Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems.

PDF

How are text links defined in a PDF file?

When you are viewing a PDF file, you may well notice that (like a web page) there are blue clickable links. These are defined...
Mark Stephens
1 min read

What are PDF Xref tables?

What are PDF Xref tables? Xref tables are part of the original PDF file specification and one of the features which gives the PDF...
Mark Stephens
1 min read

PDF stack overflow and underflow

The PDF format makes extensive use of stacks. A stack is like a pile of books. If you add an item it goes on...
Mark Stephens
1 min read

How are carriage returns, spaces and other gaps defined…

One of the biggest issues within PDF files we find is  the use of carriage returns, spaces and line feeds as gaps with the...
Mark Stephens
1 min read

Problems caused by Arial font in PDF files

The Arial Font Arial is a very popular font with a contemporary sans serif design. The font family is also on the font families...
Mark Stephens
1 min read

What is a PDF dictionary?

The basis of a PDF file is a set of linked PDF objects, and the key part of a PDF object is the PDF...
Mark Stephens
1 min read