· Use a combination of uppercase and lowercase lettering. Using all capital letters is harder to read because words formed with capital letters are repetitious rectangles that offer few distinctive shapes to catch the reader’s eye (Fig. 8).
· Use italics, change text size, vary style, or alter color instead of underlining words for emphasis. Underlining interferes with the descenders of the letters and reduces the distinctness of the shape of the words, making the words harder to read.