Technical details for screen size adjustments
To support the widest range of terminal characteristics, use a DLOGMOD specification of D4C32XX3, in the IBM® supplied MODETAB of ISTINCLM. Further information about this and Telnet server requirements can be found in z/OS® Communications Server publications.
Users of IBM® Personal Communications should reference IC71220: PCOM: HOW CAN YOU USE A 62X160 SCREEN SIZE? on the IBM® Support Portal.