>
> may I ask someone, who understands knockout and overprint in the printing
> press, to check test cases in the attached file from the test suite, if
> overprint is working or not in Mark IV, please?
>
> Regards,
> Jano
>
>
Hi Jano, as far as I can check with my pdf editors, it seems overprinting
is working. The black ink is printed above the blue, with no white reserve
below it.

-- 
Andrés Conrado Montoya
http://chiquitico.org