Leading

Leading is defined as the distance between the baselines of successive lines of type. For example, if a font style declares a 10 point font size with a 10 point font leading, then successive baselines will be 10 points apart. With a 12 point font leading, the baselines will be 12 points apart. If additional vertical space is inserted between paragraphs, the distance between successive baselines is equal to the size of the inter-paragraph space plus the current font leading.

By default, leading is not applied when calculating the vertical spacing between a paragraph and a table or boxed content. For example, the space between a paragraph and a following table is determined entirely by the current paragraph style and the table above spacing. A similar rule is applied when calculating the space between a paragraph and boxed content. You can override this behaviour if you need to include the leading within the space above a table or boxed content.