Various layouts are used in this help file:
[Ctrl-X] This indicates a keyboard shortcut. This example shows that you must hold down the Ctrl key and press the X key.
This color refers to a visible text in a window on either a checkbox or a button which you must click.
This color indicates a link to another topic in the help file. You can click it to jump to the topic automatically (except in this example).
This color indicates something that you must pay special attention to.