Along with hiding all slide elements, PowerPoint 2010 lets you hide specific slide elements as well, this comes helpful when you’d need to conceal any specific part of slide temporarily without removing the slide or its content. Adding more, you can always bring back the concealed elements anytime.
To hide the slide elements temporarily, navigate to Home tab, under Editing group, from Select options, click Selection Pane
This will open Selection and Visibility pane at the right-side of the window. You will eye-imaged icon against each element. On clicking, it will hid the respective element from slide.