Imagine the box is not there, but that the center line was trimmed back to where the box would be. Is there a way to easily do this in Solidworks? I think in another software companies Express Tools it was called EXTRIM. You could draw a box, circle, whatever and quickly clean away lines around the object you created.
Found this work around with hatch:
If you create a solid hatch, you can then select Line Color
from the Line Format toolbar. Works for what they want.