Category Archives: PDF forms

Understanding PDF forms – introduction to FDF forms

This is the second part of the Understanding PDF forms series, and in this article I aim to introduce the FDF (forms Data Format) forms to you. So how do you find FDF forms inside a PDF file? Well, you … Continue reading

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Using PDF files in unusual ways

One of my favourite features of the PDF file format is it’s flexibility. It goes way beyond a document format, it offers lots of interactive features, Javascript, and you can actually use it to develop alsorts of flexible applications. With … Continue reading

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Manipulating signatures and links in PDF files

We get quite a few questions asking about accessing Form objects on the page especially Link or signature objects. This is actually fairly easy to do. The PDF file normally contains both of these objects as Annotations. A list of … Continue reading

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Displaying PDF ‘readonly’ text fields in Java

This article follows on from previous blog What are PDF ‘readonly’ text fields? In that article I  introduced ReadOnly text fields and explained that ‘ReadOnly Text Fields within a PDF are not truly read only. This article expands on some … Continue reading

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What are PDF ‘readonly’ text fields?

Once you start to explore the PDF file format you will find out something called ‘ReadOnly’ Text Fields. So what exactly are they and how can they be useful within a PDF? PDF files contain text fields which allow you … Continue reading

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