i have issues with PDF black and white printing. Print style monochrome not show drawings to black and white. mostly i exported dwg's from other design program. as you can see at pictures preview is full color in monochrome print style.

i have only one way how i can make it. I have exiting sheet, where black and white printing works and i add exported drawings to as reference and copy new paper space and setup saved printing configuration and change all layer plot style to "style 1", when print it PDF, its become black and white. But this way is very slowly, why monochrome plot style not work without that sequence.