Typography refers to the way that characters are shaped and arranged into the phrases, statements, ideas, and information that someone wants to convey to others. Graphic design changes the absorption properties of the meaning to be derived from the message. Today, typography comes into play whenever language is displayed: on paper, on the screen, in advertising, or in signage. There are two significant trends at work: On the one hand, "printed" information is increasingly read on the screen instead of on the page; on the other, the "printing" is increasingly done by a knowledge worker rather than a graphic artist, in terms of both design and production. The traditional best practices of legibility and readability, though still subject to debate, are that fonts are more legible when they use serifs compared to sans serif fonts. Reading speed also improves when proportions of type size to line spacing are set at 120% or above, but line length also plays a part in this equation.