Test page

{
             layout: 'A4 portrait',
             title: 'A simple example',
             srs: 'EPSG:4326',
             units: 'dd',
             outputFilename: 'mapfish-print',
             outputFormat: 'pdf',
             layers: [
                 {
                     type: 'WMS',
                     format: 'image/png',
                     layers: ['basic'],
                     baseURL: 'http://labs.metacarta.com/wms/vmap0'
                 }
             ],
             pages: [
                 {
                     center: [6, 45.5],
                     scale: 4000000,
                     dpi: 190,
                     mapTitle: "First map",
                     comment: "The \"routes\" layer is not shown (the scale is too small)",
                     data: [
                         {id:1, name: 'blah', icon: 'icon_pan'},
                         {id:2, name: 'blip', icon: 'icon_zoomin'}
                     ]
                 },
                 {
                     center: [6.9, 46.2],
                     scale: 500000,
                     dpi: 190,
                     mapTitle: "Second map",
                     comment: "This is a zoomed in version of the first map. Since the scale is more appropriate, we show the \"routes\" layer.",
                     data: [
                         {id:1, name: 'blah', icon: 'icon_pan'},
                         {id:2, name: 'blip', icon: 'icon_zoomin'}
                     ]
                 }
             ]
          }

To get informations: printInfo