Any entry can be changed. For example, to change the 2.5 entry in L1 to 3.25, highlight the 2.5, type in the correction, 3.25, and press .
Any entry can be deleted. Highlight the entry and press . All list elements below the deleted one move up one place.
An entry can be inserted. Highlight the entry below which an entry is to be inserted. Press . The value is inserted above the highlighted element and will have an initial value of 0. All list elements below the inserted one will be moved down one.