On 3290 terminals, in addition to splitting
the screen horizontally, you can use the SPLITV command to split the
screen vertically, for a total of four logical screens. In the case
of the 3290 terminal, four is the maximum number of screens possible.
(The SPLITV function is not active if the data being displayed on
a screen is more than 80 characters wide.) Figure 1 shows
the effect of SPLIT and SPLITV, starting in single-screen mode.
Figure 1. Splitting the 3290 Screen
Note: - ISPF logical screens are
separate subtasks that do not share subpool 0 (attached with SZERO=NO
parameter.) Thus, VSAM data sets cannot be accessed from more than
one logical screen.
- If you are in a VSAM application, perform a split screen operation,
then enter another VSAM application in the second session, you must
be sure to end the second session before you end the first session,
or an abend can occur.
- On 3290 hardware, using the jump function to move from screen
to screen might result in the loss of data that has been typed but
not processed. The use of the 3290 hardware jump is not recommended.
- In split-screen mode, if you type a command on the command line
and swap screens before pressing Enter, the command is erased.
- You cannot start ISPF in GUI mode if you are configured to run
ISPF in 3290 partition mode.