VTAM® maintains the LU-mode table to record partner-LU names and mode-name groups associated with each LU. (See Mode name groups and VTAM LU-mode table, respectively, for more information on mode name groups and LU-mode pairs.) Application programs can use APPCCMD CONTROL=OPRCNTL, QUALIFY=DISPLAY to display values in the table and APPCCMD CONTROL=OPRCNTL, QUALIFY=DEFINE to change negotiation values in the table. VTAM can determine when entries are added and deleted from the table, but the application program also can control entries and deletions with the DEFINE macroinstruction. (See Adding to the LU-mode table for more discussion about updating information in the LU-mode table.)