9GHq6‖Displays the document with the top and bottom margins, header and footer and a gap between pages. Uncheck to collapse all the elements cited and display the document in a contiguous page stream. Hiding whitespace is only possible in Single-page view.
To access this command...
ebLJB‖From the menu bar:
LmXFe‖Choose View - Show Whitespace.
qBbLh‖From the tabbed interface:
AbVhn‖Choose View - Show Whitespace.
fzGfK‖On the View menu of the View tab, choose Show Whitespace.