Node Connectivity
There are 1178 nodes that can be used as predessesor
for a node with an input port of type 
org.knime.core.node.port.AbstractSimplePortObject.
Rotate PDF
Rotate a PDF file
Delete Pages
Remove pages from a PDF file
Remove Images
Remove images from file to reduce the file size.
Rearrange Pages
Rearrange pages in a PDF file
PDF to Single Page
Convert a multi-page PDF into a single long page PDF
Overlay PDFs
Overlay PDF files in various modes
Merge Multiple Pages Into One
Merge multiple pages of a PDF document into a single page
Crop PDF
Crops a PDF document
Timeouts
Set network timeouts
Page Size
Checks if a PDF is of a certain size