Our users need to be able to put a graphic watermark onto maps they create in the print composer. Currently we get them to georeference the image as a raster and then create a transparency. This is quite complex for some of my beginners. Anybody got any suggestions?
In print composer go Layout->Add Image. In picture options (in Item Properties tab) that will occur to the right, choose path to the image (raster or svg). In General Options (the same tab) choose the opacity value.