Set the line height of the text. Higher values will result in lines of text appearing further apart and lower values will result in lines of text appearing closer together.
Set the direction of the text. The value "ltr" represents "Left to Right" and "rtl" represents "Right to Left". For a centered page, you may also need to set the "Alignment" to "right" if you choose "rtl" as the page is explicitly set to "left" to make the centering work.