The best way to produce a good-looking worksheet is to worry about the text first and the formatting second. Type in your text and then make the changes in the appearance. Bold, italic, and other formatting changes are easy to accomplish from the Formatting toolbar.
All the buttons on the Formatting toolbar are shortcuts to items that appear in the Format menu. The menu, however, offers a great many formatting options in addition to those on the toolbar. You can use the dialog boxes available through the menu items to fine-tune some of the special formatting effects.