I am trying to list map features and the Reference Grid they fall into. The grid is setup in the Print Composer as a 50mmx50mm grid over a 400mmx400mm map with Cells Labeled as 1A, 1B, etc.. I didn't make the Grid as a spatial layer. Is there a way to list the features and the cell they can be found in referencing the Grid directly or do I have to recreate it as a spatial layer? If it has to be a spatial layer then is there an easy way to export the composer grid to a spatial format?