A style sheet is arguably the least flashy tool a beginner publisher can use, but it will also save many of us from endless correction rounds. It’s not the same as a design sheet, or an editorial report. It’s just a list of choices made while setting up your manuscript, about how to spell names, how to style headings, what punctuation rules you are using, and which words that appear frequently should be consistent from page one to the back cover.
Let’s say you’re working on a book. In chapter one, you use “e-book” when talking about digital reading. In chapter two, you write “ebook” instead. In a caption on page 15 you say “digital book.” All three of these things could work fine without a style guide, but when there is no obvious reason to prefer one option over another, it becomes a stylistic inconsistency. This is true of capitalization, abbreviations, chapter headings, dates, author names, captions, and many other words in the front and back matter. The whole reason for a style sheet is to have all the decisions in one place.
For a first project, the style sheet can be simple: a list with sections for spelling, punctuation, proper nouns, capitalization, dates, numbers, technical terminology, and layout notes. Read through your manuscript, making a note whenever you need to make a choice for the rest of the book. If the title page uses a capital letter in the subtitle, note it. If the headings use numerals rather than words, note it. If the bio page spells out the name or job title of the author, note it before it shows up in metadata or back matter.
The real problem for many beginners is that they don’t know when they should start making a note in the first place. At this point, almost everything feels significant, and you may find that your style sheet fills up with every stray detail you see on every page you read. It’s better to focus only on those decisions that you’ll likely see over and over, or that need to be consistent throughout the whole manuscript. You don’t need a specific rule for a single line in chapter 12. However, you probably do need one for repeated names or acronyms, punctuation rules, a table of contents format, or a repeated spelling. A style sheet should solve confusion, not become another document that needs editing.
Start with a sample page and read it for repeatable decisions only. Don’t worry about the whole manuscript at the moment. Identify any spelling options (one word or two, with or without a hyphen?), note if chapter headings have one specific pattern, mark any numeric formatting or number style (do you spell out 1 to 9?), and decide which specific punctuation marks you want to use throughout the manuscript. You might write notes like this: “Use ebook without hyphen in all instances,” “Title case for Chapter headings,” “Spell out numbers under ten in body text,” “Always hyphenate open to open,” “No Oxford comma,” etc. These will be very helpful references in the copyediting and proofreading stages because they provide you a checklist to check off.
It also serves as an easy way to leave handoff notes. It can be difficult to tell an editor, designer, or author that you need the whole manuscript to be “consistent,” but a style sheet lists exactly what was chosen when and why. A designer will use heading levels more easily if they are listed. The proofreader will be less likely to question whether a proper noun is spelled correctly if you’ve listed it. Your metadata person will know how you describe the book, the exact spelling of all contributor names, and what capitalization rules you’ve used in subtitles.
What is most helpful is that you’re not making decisions over and over again when they can be made once. You’ll have a manuscript where spelling, heading style, and punctuation all seem intentional and uniform rather than contradictory. The next time you are working through another round of corrections, look over your style sheet and double check to see if you’ve made a choice for every detail that appears multiple times.