As you read through How to Do Everything with HTML & XHTML, you’ll find some helpful resources mixed in with the regular text. These special icons and text boxes will give you additional information related to the topic at hand. These helpful conventions and their names are as follows:
Did You Know boxes give you interesting and helpful background information that is related to the topic at hand.
How To text boxes add special tips and tricks and other fun things you can do.
Notes provide additional information that is related to the particular discussion but are not necessarily action-oriented.
Tips contain additional tidbits of information that will make things easier—how to make the best use of software features, and so on.
Shortcuts offer time-saving steps and suggestions for easier ways to perform particular tasks.
Look to Cautions for information about pitfalls to avoid, workarounds to employ, and “gotchas” to be aware of.