character toolbar

The first button is Horizontal Line  Icon of Horizontal Line.  This allows you to put a horizontal line to divide page content (see below).

The second button is Insert Line Break  Icon of Line break.  This will insert a single line space, rather than the double line space of a new paragraph.  Shift/Enter will also create a single line break, as enter creates a new paragraph/double line space.

The third button is Special Character  Icon of Special Characters. This button opens a special character dialogue box. 

special characters available for use