Hi Johannes,
At present, we do support for SaveProgress event only in PdfDocument i.e., newly created document and don’t have support in PdfLoadedDocument i.e., existing document. We have logged a feature request and will implement this feature in any of our upcoming releases. The feature implementation would also greatly depend on the factors such as product design, code compatibility and complexity. We request you to visit our website periodically for feature related updates.
Regards,
Dilli babu.