Emphasis Techniques In Your Letters
Emphasis techniques, like a combination of bold and italics, help bring out important points. The most important rule to remember is to limit emphasis techniques to important information. Putting everything in bold, for instance, is like shouting all the time. It makes it impossible for the reader to know what is really important.
Using vertical lists is also another way of emphasizing information. Here too, you don't want to overuse the technique. So, even if you can make a vertical list out of everything on the page, don't do it. Choose things that need the most emphasis. For instance, you may want to emphasize a list of what you want students to bring to class, rather than a list of what the teacher will supply.
PUTTING EVERYTHING IN CAPITAL LETTERS IS NOT A GOOD EMPHASIS TECHNIQUE. ALTHOUGH IT MAY DRAW THE READER'S ATTENTION TO THE SECTION, IT MAKES IT HARDER TO READ. Similarly, underlining will draw the reader's attention to the section, but it makes it hard on the eyes. In both of these cases, it is better to use bold and italics for only the important issues.
Using "Notes" or "Reminders" in bold and italics is a very effective way to emphasize information.  Keep in mind that "Reminders" should only be used to reinforce information. "Notes" can be used for anything.