Please, enable an option to disable the drop shadow on the artboard in 'Normal' screen mode in the 'View' menu (on the right side and in the footer of the artboard/sheet). The shadow makes it very difficult to achieve accurate positioning and alignment of objects. I found several people on Google complaining about the same thing, and there is no solution! The "Preview", "Bleed" and "Spacer" options do not have the shadow, but they also do not display what is on the workspace outside of the artboard/sheet. The "Normal" screen mode has to look like the artboard/sheet in Illustrator. I'm sending a screenshot with the problem marked and another showing how it should look.