Plotting all black

Hey i want to make my own plot style. Where all colors drawn in are plotted black. Except gray. I would like grey to plot slightly lighter. Is there any way to change all 200+ colors black instead of individually changing them?

im sure this has been asked before. But my search found nothing

Yes sure select the top one then scroll down to the bottom one with shift held down then you should select them all and chance to black.

Ctrl A doesn't work for some reason.

When plotting you can use the standard monochrome.ctb plot style which has everthing black and then use the plot style editor to change grey (color eight i if im correct) to what ever you would like it to be. Then either save the changes and always have monochrome plot like this or use the save as option in the plot style editor and save it as whatever name you would like (recommend). Hope this helps.

and to make the gray come out lighter you can make the screening something like 80 but a low number might be to light so test it out