Node Connectivity
There are 81 nodes that can be used as predessesor
for a node with an input port of type 
Stirling PDF Nodes: Configuration.
Remove Cert Sign PDF Modern UI
Remove digital signature from PDF
Get PDF Info Modern UI
Summary here
Sign PDF With Cert Modern UI
Sign PDF with a Digital Certificate
Add Watermark Modern UI
Add watermark to a PDF file
Add Password Modern UI
Add password to a PDF file
Handle Data Modern UI
Execute automated PDF processing pipeline
Metadata Modern UI
Update metadata of a PDF file
Unlock PDF Forms Modern UI
Remove read-only property from form fields
Extract Header Modern UI
Grabs all JS from a PDF and returns a single JS file with all code
Replace and Invert Color Modern UI
Replace-Invert Color PDF