Allows you to check the CMYK ink coverage either of all colors combined or per separation on a page (inside a particular page box).
You can for example check if the ink coverage in the media box is at least 300%.
In case of a separation-based check, you may exclude separations with 0% ink coverage (i.e. empty areas without content).
It's also possible to ignore small areas, for example areas smaller than 1 inch.