Added short section describing info.

notes.org

@@ -138,6 +138,10 @@ then see a selection appear when you move the cursor away from that location.
 Often called the selection, it's the area of lines between a mark (set by =C-Space= earlier) and
 your current cursor location (point).
 
+*** info
+This is a help format that's used internally for the help documentation of Emacs. It's a cut-down version
+of TeX called texinfo, which is then compiled to create an info document for use with the standalone info
+command or the internal help (=C-h i=). It contains formatting, links and a syntax for moving the cursor around between sections that's much like the =movement-keys= section below.
 
 ** What different keys mean
   :PROPERTIES: