Special display panel

If you issue the DISPLAY service call with only a message parameter, or with no parameter at all, the Special Display Panel is shown (Figure 1).
Figure 1. Special display panel (ISPYS2)
 ┌──────────────────────────────── Dialog Test ────────────────────────────────┐
 │                           Special Display Panel                             │
 │                                                                             │
 │ This panel is used for two special DISPLAY conditions:                      │
 │                                                                             │
 │ 1.  When DISPLAY is invoked without a panel name.                           │
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 │ 2.  When TBDISPL is invoked without a panel name. All of the other          │
 │     parameters are ignored.                                                 │
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 │ Command ===>                                                                │
 │  F1=Help     F2=Split    F3=Exit     F9=Swap    F12=Cancel                  │
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