(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 "History List" Menu item toggles the 
UseHistoryList property of the HTDisplayBox. When 
UseHistoryList is true, each new file which is loaded 
has its filename saved in a list which is acessible 
via the combobox in the ToolBar (see the "Show 
ToolBar" menu item entry) up to the 
MaximumHistoryItems property, after which each 
new file pushes one old file off the list. If 
UseHistoryList is false, no filenames are saved and 
each new file simply replaces the old one completely.

