# 3.15 Interactive help

In addition to this Users’ Guide, Pyxplot also has a `help` command, which provides a hierarchical source of information. Typing `help` alone gives a brief introduction to the help system, as well as a list of topics about which help is available. To display help on any given topic, type `help` followed by the name of the topic. For example,

    help datafile

provides information on the format in which Pyxplot expects to read data files and

    help plot

provides information about the `plot` command. Some topics have sub-topics, which are listed at the end of each page. To view them, add further words to the end of your help request – an example might be

    help set title