The toolbar is just below the menu bar. It is a collection of icons that provide easy access to commonly used functions. The same functions are also available as menu options from the menu bar.
Active functions are shown in color while inactive or unauthorized functions are in gray. To hide or display a toolbar icon group, place your cursor on the toolbar, right-click, and then check or uncheck the appropriate boxes. Toolbar icons are context sensitive, that is, they change depending on what you are doing.
If you forget what a particular icon does, simply move the cursor over the button to display a tooltip.