The Help tab (Figure 2.11: Help Tab) provides information about the Polydata menus. This tab is automatically opened to information about the current menu when you select the Current menu option from the Help drop-down menu. Buttons at the top of the tab allow you to browse the available information: the Index button ( ) displays the index; the Back button ( ) displays the previous page of your browsing history; the Current button ( ) displays the page for the current menu; and the Forward button ( ) displays the next page of your browsing history. You can also use the Increase Fonts button ( ) and the Decrease Fonts button ( ) to increase and decrease the font size of the text within the tab.