source: If any of these PDFs contain pictures, then they require additional processing before they can be issued
target: If the PDFs contain pictures, they cannot be shared unless they are changed.
references: If the PDFs contain pictures, they cannot be shared unless they are changed. Therefore, these PDFs cannot be distributed without further manipulation if they contain images. Therefore, these documents with PDF format should be editted if they contain images, in order to be distributed. Therefore, if these PDFs contain images, they cannot be distributed without further manipulation. This is why the PDFs, if they contain images, will need to be further manipulated before they can be distributed. These PDFs cannot be distributed without further manipulation. Because of this, these PDFs cannot be sent out without more changes if they contain pictures.