>ever notice how on the 80, 81, 82, 83 if you try to delete a >single character from a function you selected (say Disp or >something) the whole function disappears? Those calcs store >a function as a one (or two) byte reference variable to know to >which one you are referring. The TI83 only deletes what you have selected. If you delete say, DISP, it will leave the quoted text. Grant