The "Unit Transaction Types" screen registers and changes unit transaction types. The screen has the following entry fields: - "Code": The unique code of the unit transaction type. - "Description": The description that reports and screens display. - "Sort Order": A numeric value by which the unit transaction types are sorted when a screen shows them in a list box. - "Reverse Sign": When checked, the sign of the transactions is reversed. For example, a positive number of units in a transaction decreases the stock when this field is checked and increases the stock when it is not checked. - "Explanation": An optional explanation.