NPrinting filters, those saved in NPrinting Project files, have higher priority than Additional Filters added through current selections.
Excerpt from the following turorial page:
- If current selections are set in a QlikView document and a report contains pre-existing NPrinting filters applied to the same fields, the current selections will be replaced by the pre-existing NPrinting filters. Example: a user selects Country=UK in a QlikView document’s list box and an NPrinting Report contains filters for Country=Austria and Salesman=Joan Callins, the NPrinting selections will prevail
- If current selections are present in a QlikView document and a user adds additional filters to an NPrinting Report Object (Right click on the NPrinting Report Extension button -> Filters settings -> Additional saved filters, then enters the name of filters already saved in the NPrinting project) to the same fields, the additional filters will not be applied. Example: a user selects Country=UK in the QlikView filter box and then adds Country=USA as an additional filter, only Country=UK will be applied.
- If a user selects some values on fields not present in the NPrinting filters, they will be added to the filters. Example: a user selects Category=Babywear and the NPrinting filters are Country=Argentina and Year=2013, the report will contain data on Babywear sold in Argentina during 2013
See official tutorial: https://community.qlik.com/docs/DOC-8449