Within the text appear notes, warnings, and examples.
Note: Notes are represented like this, and contain information that you should take note of, as it may affect what you do.
Tip: Tips are represented like this, and contain information that you might find useful, or lead to an easier way to do something.
Important: Important information is represented like this. Typically they flag extra steps you may need to carry out.
Warning: Warnings are represented like this, and contain information warning you about possible damage if you do not follow the instructions. This damage may be physical, to your hardware or to you, or it may be non-physical, such as the inadvertent deletion of important files.