sets the scroll bar trough to red. Buttons that have been pressed but
not released yet (``armed'') are in this state.
@item PRELIGHT
-This is the state when widgets that can be manipulated have the mouse
-pointer over them. For example when the mouse is over the thumb in the
-scroll bar or over a menu item. When the mouse is over a button that
-is not pressed, the button is in this state.
+This is the state for a widget that can be manipulated, when the mouse
+pointer is over it---for example when the mouse is over the thumb in
+the scroll bar or over a menu item. When the mouse is over a button
+that is not pressed, the button is in this state.
@item SELECTED
-This is the state when some data has been selected by the user. It can
-be selected text or items selected in a list.
-There is no place in Emacs where this setting has any effect.
+This is the state for data that has been selected by the user. It can
+be selected text or items selected in a list. This state is not used
+in Emacs.
@item INSENSITIVE
This is the state for widgets that are visible, but they can not be
manipulated in the usual way---for example, buttons that can't be