Drill Down: Shifting from summary to detail information.
Description: Drill Down visualizations are useful to show meta data and detailed data. These visualizations offer a big picture view with access to the details. Providing context in conjunction to details of the data might help the user better understand the big picture.
Connected Bubble Chart
Display of 4 variables against an x and y axis. Size, color, saturation and connected path of the bubbles all have meaning. Specific values are also presented to the viewer as additional detail. Tulp Interactive