The documents are split into several PDF document parts when this option is enabled. Normally, splitting is not necessary. It leads to considerably slower processing times and, for that reason, you should only select it when splitting is absolutely necessary.
"on" list box
This is where you can select the DocumentSplitter engine that will be used to split the documents. Generally, you can use the default setting "AllDocumentSplitters".
Note: The splitting of documents is not a requirement for the subsequent steps in your workflow. In the Prinect workflow, single pages are also shown and handled separately even if they are combined in one PDF document.