# 62 Changing the font-size and line-height in your PDF outputs

You might want the font-size in your book to be smaller, or larger. You can adjust this using the Custom CSS feature. (Please read this first!).


body {
font-size: 11pt;
line-height: 1.4;
}


Font-size is the size of the typeface, in “points.”

Line-height (called “leading” in traditional typography), is the distance between the baselines of successive lines of type, or the space between the lines of type. Line-height is expressed as a multiple of the size of the font, so line-height: 1.2 means: “1.2 times the height of the font.”

So, if you want to decrease the page-count of your book, you would reduce the font-size, and line-height. Your edited CSS would look like this:


body {
font-size: 10pt;
line-height: 1.2;
}


On the other hand, if you want to make a “large print” book, or just increase legibility, you might increase the font-size, as well as the line-height. Your edited CSS would look like this:


body {
font-size: 12pt;
line-height: 1.5;
}


Note 1:
Neither font-size nor line-height should be changed in Ebook CSS, since the user/reader should be able to decide font-sizes for themselves.

NOTE: We have recently introduced a new method for setting your body font size and line height in select themes. For more, see our guide chapter on the changes.