Splitting the screen horizontally or vertically

While using a dialog, you can use the SPLIT command to partition the display into two or more logical screens. The logical screens are treated as though they are independent ISPF sessions.

The maximum number of screens available to you depends on the value of the MAXIMUM_NUMBER_OF_SPLIT_SCREENS keyword in the ISPF Configuration table. ISPF ships with a default figure of 8. Support for up to 32 split screens is available for all terminal types except the 3290.

Note: If you are running in GUI mode, when you split a screen, the new screen is displayed as a new physical window. If you want, representations of every screen can be displayed at once. Although a 3270 screen can only display two screens at one time, there can be other screens (up to 32) that are not visible. You can select which logical screen to display by using the SWAP LIST command to display a list of logical screens.