AutoCad - Display Plot Styles
View your drawing in AutoCAD as it's going to look when it's printed by selecting "Display Plot Styles" in the Page Setup dialog box.
AutoCAD displays drawings in color and then translates the drawing data to a different printed format. Typically, we need to do a plot preview to see what the layout is going to look like when plotted, but you can change this via Display Plot Styles. Set your main layout in this way or create a separate layout to act as a "live" preview so that you can still work in your traditional colored layout view.