Indicates new terms, URLs, email addresses, filenames, file extensions, pathnames, directories, and Unix utilities.

Indicates commands, options, switches, variables, attributes, keys, functions, types, classes, namespaces, methods, modules, properties, parameters, values, objects, events, event handlers, XML tags, HTML tags, macros, the contents of files, or the output from commands.

Shows text that should be replaced with user-supplied values.

Shows commands or other text that the user should type literally.