The User Display Management (USRDSPMGT) keyword causes the record formats in the display file to function similarly to System/36™ SFGR display formats.
The SFGR-to-DDS conversion utility always generates the USRDSPMGT keyword. If you are defining a DDS display file to be used in the System/36 environment, you should specify the USRDSPMGT keyword.
For a description of operational differences, see the Application Display Programming book.