A small cap letter is an uppercase (i.e., "cap" or "capital") letter that's about the same height as nearby lowercase letters. I first noticed them in Business Week about ten years ago, and found them disconcerting.
- Small caps are frequently used for decorative effects on book covers and title pages and at the beginning of a block of text.
- They're also used for abbreviations and acronyms like USA, FBI, SCUBA, RADAR, A.M. and IBM. Some publications have rules to use small caps for abbreviations and acronyms longer than three letters, which results in arbitrary and awkward typography. Abbreviations a.m. and p.m. are often smallcapped—but may be uppercased or put in standard type.
There are several problems with a few letters in small caps.
- They look stupid at the beginning of a sentence. Sometimes a sentence can be reworked to avoid the problem. Some typographers switch to full-size, others keep the small caps up front. I prefer to rewrite.
- If you have the names of two competing entities nearby, and one has normal lettering and one has small caps, there is an implicit downgrading of the one with small caps. USA looks less important or powerful than Canada. B&N is dominated by Amazon. HP and IBM are overpowered by Dell.
- If you have a compound name like "U.S. Capitol," "U.N. Building" or "PR Newswire," it looks silly for the "U" or the "P" to be smaller than the first letter of the next word.
- A title like "HTML Guide" would look silly if "HTML" was smaller than the "G."
I avoided small caps in my first nine self-pubbed books, but as I tried to get "more professional" I started to use them in book #10, Get the Most out of a Self-Publishing Company: Make a better deal. Make a better book. After several hours, I got so frustrated trying to resolve inconsistencies, I gave up and went back to full-size caps.
If you have a lot of time to kill and are a graphic masochist, you can try using small caps. I doubt that I'll try them again, except in titles or other small doses.
Some typeface packages include characters specifically designed to be use as small caps. Software (including Microsoft Word) can make 'fake' small caps. The real small caps look better adjacent to full-size caps because they have thick strokes to match their big brothers. The fakes are "scaled down" caps and have unnaturally thin strokes. Fakes may be noticed by professional typographers, but probably not by readers.
When you self-publish you can even change a title to take advantage of the way type looks. Publishing freedom is wonderful and powerful.
This posting is based on material in wonderful Typography for Independent Publishers.