Most commands and functions are documented on reference pages
called "Manual pages", commonly known as "man" pages.
Man pages provide quick access to detailed information about
one command or function.
The man pages are grouped into sections that are numbered
from 1 to 8.
To search for a man page, enter the name of the
command or function
and click Search. If the command exists in more
than one section, you
will be presented with a list to choose from. If
you specify a Section
number, then only that section will be searched.
If you don't know the exact name, you can check the
Search descriptions also box.
That will scan the list of commands and
descriptions for your search string and give you a list to
choose from. If you want to search through the full
text of man pages, use the DocView
If you select Display List of Manpages, you will see
one long list of
all the man pages installed on the system, sorted
section. You can scroll through the list, or use
the browser Find
option to find a specific man page.