Choosing the right typeface will give you the option of using bold, italic, semibold and other type styling options. Your software should allow you to apply some additional font styling options such as leading, kerning and tracking adjustments to impact your design's readability and visual appeal.
Font size
In your typesetting workflow, choose your fonts first, and then choose your font sizes. Layout programs come with a default size setting, usually 12 points, and somehow 12 points is never the right size.
When selecting a font size for body copy, choose a size large enough to be easily readable. Start by trying a setting of 10 or 11 points, but be prepared to change the size again. Font size is calculated by measuring the distance from the top of the ascenders to the bottom of the descenders. The length of ascenders and descenders relative to x-height may make some fonts appear smaller and some appear larger. You'll have to learn to trust your judgment on choosing a font size that hits the correct note between mousetype and horsey.
Don't forget to consider your audience. If your target audience is middle-aged or older, go larger rather than smaller. The older people get the more likely they are to need reading glasses. They'll appreciate bigger fonts. Trust us.
Choose font sizes for such things as headings based on both readability and contrast. Headings must contrast with body copy, so make them really contrast. A 12-point heading barely contrasts with a 10-point body copy font; a 36-point headline greatly contrasts.
Bold & italic type
Back in the day, using all caps and underlining were the only options for emphasizing typewritten
words. Thank goodness, we've evolved. Now we have bold and italic in the toolbox.
Both bold type and italic type can create emphasis in short copy situations, such as headings, subheadings or short body copy.
Did we mention short copy situations? Use bolding or italics sparingly. Neither bold nor italic is appropriate for entire pages or long paragraphs of type. Ugh. Too much italic is hard to read, particularly on screen. And too much bold defeats the purpose of having bold at all. When there's too much of it, nothing stands out.
We also would like to point out that not all bolds are created equal. Some bold fonts are bolder than others. Sometimes a bigger font size, a different color or a different font altogether provides greater contrast than using just plain bold.
All caps
All caps are another old-school style of emphasis. They can be difficult to read in long blocks of text. As with many type treatments, type set in all caps cuts down on readability. When we first learn to read, we are taught the shape of each letter and its corresponding sound. We put letters and their sounds together to make words. Over time, our mental process shifts to the point where we recognize shapes of words without the need for scanning and adding up individual characters. But when you capitalize words, they lose the ascenders and descenders that make up their unique shapes. Every word becomes a rectangle, and our brains have to work just a little bit harder to recognize the word.
To add insult to injury, we have come to associate all caps with shouting. And nobody likes to be shouted at.
If you want to use all caps, make sure they don't interfere with your visual communication purpose, including readability.
Leading
Pronounced “ledding,” leading is the technical term for line spacing. It comes from the days of setting type by hand. Once upon a time, typesetters used a slug of lead to separate each line of type.
Today, your computer calculates leading. Every font size has a corresponding default number (a percentage of the
font size) that serves as line spacing. This default number works okay most of the time. However, there are times when you need to adjust it.
When the body copy font has a large x-height, thus reducing the crispness of the shapes of words, additional space between lines of type can improve readability. A little extra leading increases readability, too, when the body copy is set in a sans serif font or when the eye must track across a very long line of type, as in wide columns or no columns. Be careful not to overdo additional leading, as too much space also cuts down on flow and readability.
You might add extra leading for decorative purposes, too, but only for limited amounts of type because of the negative impact on flow and readability. A little extra leading can give the sense of elegance or lightness/airiness, if that serves your communication purpose. Just remember to balance it with readability and flow.
On the other hand, when creating large headlines, reducing leading is essential. Because leading is mathematically calculated based on font size, as the font size increases, so does the leading—exponentially. For headlines more than one line deep, decrease the leading to bring the lines closer together (i.e., clumping). Beginning designers often overlook this step, leaving headline gaps you could drive a bus through.
Kerning
Manually adjusting the negative space between two characters is called kerning. Most design programs are set to adjust these spaces automatically. However, you still may need to do some fine-tuning.
When uppercase letters have diagonal lines, such as on the capital W, adjacent letters may appear too far away, particularly when font sizes are large. You also may need to adjust the kerning in large headline words that begin with the capital letters T, P and F.
Tracking
Adjusting letter spacing across a string of characters, such as a sentence or paragraph, is called tracking. You also can manipulate tracking for decorative purposes to create tightly packed or loosely spaced words.
Sometimes tracking becomes useful for copy fitting. For example, when you have a widow at the end of a column, decreasing the tracking on that sentence may pull the lone word up to the previous line. Your reader will never notice the difference.
Adjust tracking with care. It's easy to go overboard and end up with squished text. Try to limit tracking adjustments to “-10” or less.
Tabs & tab/dot leaders
Sometimes, in order to keep things aligned, you need tabs. Use tabs for columns of numbers, too, and pay attention to aligning decimal places. Sometimes tabs space out farther than the eye can travel without some help. In those cases, instead of making readers' eyes do the typographic equivalent of a stunt jump across a Grand Canyon of negative space, tab or dot leaders can function like visual bridges. They assist flow by leading the eye along their line of sight.