There are different ways to style words, names, phrases, and so forth. It's considered bad form to have such things styled two or more different ways in the same book. To avoid this, as book editors, we were trained to use what we called "Style Sheets." This was a three-page document, each page divided into thirds by height and width. Twenty-seven blocks, each headed by a letter in the alphabet, with one left over for numbers and "other." The idea was, when editing a book, the very first time you ran across a term you thought you'd see again and which might have two or more different ways to style, you would make a decision as to how you wanted to handle it, and note it on the Style Sheet. Next time you ran across that term, you didn't have to try to remember how to style it, you just looked at the decision you'd already made and do it the same way again. It was a VERY useful and time-saving way to do things. The Style Sheet went with the manuscript for typesetting and, later, for proofreading--it was THE BIBLE for that particular book. Seems like a complicated pain-in-the-ass way to do things, but only at first--it became very natural and very quick and almost completely prevented annoying inconsistencies from appearing in the finished book.