If you edit data in the upper half of a split form, you must make the same changes in the lower half.

Split Form

A user interface layout that splits the screen into two sections, typically used in database applications to display a list of records on one side and detailed view of the selected record on the other.

Edit Data

The process or action of updating, correcting, or modifying existing data or information in a database, document, or file.

Upper Half

Generally refers to the top half portion of an object, area, or concept.