How to remove double rectangle from artboard in Illustrator CC?

Question

There's this double rectangle centered on my focused artboard. how can i remove it?

screenshot:

Answer 1

Those lines are Print Tiling guides. They're designed to help you print a single design over multiple pages. For more information on Print Tiling in Illustrator check out the Viewing Artwork article within the Adobe Help section.

To hide the guides, select Hide Print Tiling from the View menu.