[TG] PDF Viewer limitations

[Tom - Raymarine - Moderator]

Hello BernieK,

PDF documents can be funny. The PDF standard is nowadays a freely-available, open ISO document but it wasn't always the case, earlier versions were proprietary and even today Adobe, the original developer, offer (I believe) their own proprietary extensions. Not all PDF documents are created equal. Possibly the documents you're looking at were created with software that doesn't produce completely standards-compliant documents. Personally I have seen many PDF documents that display differently from one viewer to another, and often that will only display properly in Adobe's own Acrobat viewer and so presumably do contain proprietary or non-standards compliant elements. The primary intended application of the PDF viewer is our own handbooks and we don't extensively test upon other documents.

Regards,
Tom