When exporting an object that has a scroll bar, it is not possible to export the full object to a PDF or image. Only the visible part of the data is exported. Right click and export with PDF option leads to this result as well as doing a snapshot in Storytelling. This is requested by many users and can even lead to wrong interpretations of data e.g. Totals on top are not represented by the data below. This is a very basic feature and is provided be other BI tools. I wish would implement this in near future.
Refering NPrinting is a solution is not appropriate. NPrinting is an additional tool and brings additional costs.