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When the starting point for a PDF file is a set of images, or a scanning
process, this text layer is not present and the result is an image-only
PDF. When the starting point is an editable document, the text layer can
be created and the PDF is called 'Normal' or 'Searchable'. The creator of a
PDF can require provision of a password to allow access to the text layer.
How does PDF Converter work?
PDF Converter has the ability to perform Optical Character Recognition
(OCR). This is the process of extracting text from an image. It does not
need to use OCR to unlock PDF or XPS files with an accessible text layer
- it must capture the page layout and arrange the given text and other
elements correctly on each page in the new document.
Optical Character Recognition (OCR) is normally used only for input
pages without an accessible text layer or when non-standard character
encoding is detected, but you can require it for any conversion under
Processing Options in the Converter Assistant.
Display layer
Text layer