This guide will show you how to use the new Artboard Contrast Slider.
The Artboard Contrast Slider is located in the Design Central pop up. The Design Central window is open by default. If it has been closed you may open it by clicking on the Design Central icon in the Main Toolbar, or go to View > Design Central.
OR
The slider is found on the default tab of the Design Central window. Be sure to deselect the design then click anywhere on the background of your artboard.
This is the Slider at 0%
This is the Slider at 50%
This is the Slider at 100%