You are talking to the program Info, for reading documentation.
Right now you are looking at one Node of Information.
A node contains text describing a specific topic at a specific
level of detail. This node's topic is "how to use Info". The mode
line says that this is node
Help in the file
The top line of a node is its header. This node's header
(look at it now) says that the
Next node after this one is the
Help-P. An advanced Info command lets you go to
any node whose name you know. In the stand-alone Info reader program,
the header line shows the names of this node and the info file as
well. In Emacs, the header line is duplicated in a special typeface,
and the duplicate remains at the top of the window all the time even
if you scroll through the node.
Next, a node can have a
Previous or an
Up links, or both. As you can see, this node has all of these
Now it is time to move on to the
Next node, named
>> Type n to move there. Type just one character; do not type the quotes and do not type a <RET> afterward.
>> in the margin means it is really time to try a command.
>> If you are in Emacs and have a mouse, and if you already practiced typing n to get to the next node, click now with the middle mouse button on the
Nextlink to do the same ``the mouse way''.