Drill in is initiated by clicking the metric value. The resulting report shows the Amount broken down by quarter, filtered for the year 2012.
{"Image XResolution": "15001/100", "Image YResolution": "15001/100", "Image ResolutionUnit": "Pixels/Inch", "Image ExifOffset": "78", "EXIF ExifImageWidth": "1256", "EXIF ExifImageLength": "566"}