You can use the following
SAS system options to customize the windowing environment under
z/OS:
specifies which character
set or screen size to use for a device.
specifies what type
of symbols to use in window borders and other widgets.
specifies which terminal
device driver to use.
specifies which type
of IBM 3270 data stream to use for a terminal.
specifies which set
of function keys to designate as the primary set.