Panels in the user interface can be shown or hidden individually, or all at once.
Use the ">" and "<" arrow buttons at the perimeter of the Viewing Grid to show or hide individual panels.
Press F11 to simultaneously hide all Panels, and zoom DW Spectrum to fill the screen. Press F11 again to show all Panels. (Note that the product window remains maximized.)
You can also use Fullscreen Mode to simultaneously hide all four sliding panels and expand the display of a single Item to fill the entire layout.