- * some other data not interesting here
-This class is used only for undo and contains the Cursor element that
-are not GUI-related. In LyX 2.0, Cursor was directly deriving from
-DocIterator
+ * some other data that describes current selection, cursor font, etc.
+
+ This class is mostly used only for undo and contains the Cursor
+ elements that are not GUI-related. In LyX 2.0, Cursor was directly
+ deriving from DocIterator