In other instances, you might have really wanted the characters in your document, not the line that Word thought you wanted. In some instances, this Word feature can be a great timesaver. In each case, Word replaces your characters with a different type of line. Have you ever noticed how if you type a few equal signs on a line in your document, and then press Enter, Word replaces what you typed with a double line that extends the whole width of your document? Actually, this works if you enter as few as three equal signs, dashes, or underscores.