This means putting as many words of input text on one output line as possible. This means padding lines with blanks so that the margins on both sides are even. Book and magazine text is typically both filled and adjusted. Printed text is often in multiple fonts. Italics are often used for emphasis.
Bold text is used for strong emphasis and for headings.
Photo-typesetters give you the ability to print characters at different sizes. Text can be made smaller or larger as needed. For example, footnotes are often set in a smaller point size than normal text. Any number of input lines can be centered in the output text. Horizontal and Vertical Motions.