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.
Extract Image Scans Modern UI
Extract image scans from an input file
Extract Images Modern UI
Extract images from a PDF file
Flatten Modern UI
Flatten PDF form fields or full page
Metadata Modern UI
Update metadata of a PDF file
Optimize PDF Modern UI
Optimize PDF file
Overlay Image Modern UI
Overlay image onto a PDF file
Process PDF With OCR Modern UI
Process a PDF file with OCR
Remove Blank Pages Modern UI
Remove blank pages from a PDF file
Repair PDF Modern UI
Repair a PDF file
Replace and Invert Color Modern UI
Replace-Invert Color PDF