Rewind Start Code (field and check box) -- The Rewind Start Code field is to contain the character that will be output at the end of the machine control data file representing the rewind start code. Change the value only if it differs from the rewind stop code that is to be output at the beginning of the file. The Use Normal Rewind Start Code check box specifies the use of the standard start code. If not selected, then the Rewind Start Code field is displayed. (Intcom 1929)