(Note: The change caused by this menu option is only 
visible by opening another hypertext file or by using 
a jump link to another file.)

The "Narrow Line Spacing" and "Wide Line Spacing"
menu items reset TheCurrentLineSpacing property
of the HTDisplayBox component. This value is added
to the height of each display line, which is calcu-
lated based on the default hot and cold fonts at
startup of the program. (If a graphic is found on
a line, the height of the largest graphic on the
line will become the line height.) Narrow margins
uses a value of 5 pixels, while Wide Margins uses
a value of 15 pixels.
