You can change the visibility of the document window using the Mode buttons at the bottom of the toolbox or by choosing commands from the View > Screen Mode menu. When the toolbox is displayed in a single column, you can select view modes by clicking the current mode button and selecting a different mode from the menu that appears.

Normal Mode 

Displays artwork in a standard window with all visible grids and guides showing, non-printing objects showing, and a white pasteboard.

Preview Mode 

Displays artwork as if it were output, with all non-printing elements suppressed (grids, guides, non-printing objects), and the pasteboard set to the preview background color defined in Preferences.

Bleed Mode 

Displays artwork as if it were output, with all non-printing elements suppressed (grids, guides, non-printing objects), the pasteboard set to the preview background color defined in Preferences, and any printing elements within the document's bleed area (defined in Document Setup) showing.

Slug Mode 

Displays artwork as if it were output, with all non-printing elements suppressed (grids, guides, non-printing objects), the pasteboard set to the preview background color defined in Preferences, and any printing elements within the document's slug area (defined in Document Setup) showing.