Use view modes to manage the workspace

In the Tools panel, select from one of three view modes to control the layout of your workspace.

 Standard Screen mode

The default document window view.

 Full Screen with Menus mode

A maximized document window view set against a gray background. Menus, toolbars, scroll bars, and panels are visible.

 Full Screen mode

A maximized document window view set against a black background. No menus, toolbars, or title bars are visible.

 community help (adobe.com)