Here is the way to maximize the Data-Ink Ratio in the box plot.
- Avoid heavy grids.
- Replace enclosing box with an x/y grid.
- Prune graphics by: replacing bars with single lines, erasing non-data ink; eliminating lines from axes; starting x/y axes at the data values.
- Avoid over busy grids, excess ticks, redundant representation of simple data, boxes, shadows, pointers, legends.