Adobe Acrobat is a family of application software and web services developed by Adobe Systems to view, create, manipulate, print and manage files in Portable Document Format (PDF).
Are there really 3 types of fonts in PDF files? There is an old joke that runs There are 3 types of Mathematican. Those who can count and those who can’t (well I thought it was quite funny)…. I was reminded of it it this week looking at some example PDF files. In theory there…
I have been looking at some Annotation issues and came across an interesting feature in a sample PDF file. I viewed it in Acrobat’s viewer and saw the following. It is a freetext annotation with an AP object to define how it appears. It was not appearing in our PDF viewer so I dug down…
I have been looking at a PDF file today which has a rather ‘interesting’ feature. If you look at the screenshot, you will see that in Mac Preview, the text is white, whereas in Acrobat 9.0 it is black… The reason that Preview is displaying it white is because the color is set outside the…
A PDF file are designed to be resolution independent – they are defined using resolution independent units so that the page will always appear the same size whether it is printed or displayed on any device (regardless of the dpi of the output device). So what happens if you use these units when outputting to…
One of the big issues in the PDF world is the number of ‘dodgy’ PDF files which work despite being poorly constructed and not meeting the PDF file specification. I highlighted one case last week. Acrobat has a large number of undocumented repair functions (so the PDF file creators often do not even know that…
