Node Connectivity
There are 1571 nodes that can be used as predessesor
for a node with an input port of type 
org.knime.core.node.port.AbstractSimplePortObject.
Scanner Effect Modern UI
Apply scanner effect to PDF
Unlock PDF Forms Modern UI
Remove read-only property from form fields
Add Password Modern UI
Add password to a PDF file
Add Watermark Modern UI
Add watermark to a PDF file
Get PDF Info Modern UI
Summary here
Redact PDF Auto Modern UI
Redact PDF automatically
Redact PDF Manual Modern UI
Redacts areas and pages in a PDF document
Remove Cert Sign PDF Modern UI
Remove digital signature from PDF
Remove Password Modern UI
Remove password from a PDF file
Sanitize PDF Modern UI
Sanitize a PDF file