A total of 89 diagnostic windows are available for diagnosis on the screen. The windows are designated W0 through W9 and W21 through W99 (W10 through W20 cannot be used as diagnostic windows). These windows consist of
the overview window (W0)
the help window (W1)
the status window (W2)
the stack window (W3)
the dump windows (W4 - W9 and W21 -W99)
A maximum of 19 lines of one or more windows, including the dividing and header line(s), can be displayed on the screen.
The windows can be assigned contents during the diagnosis session:
Window W0 contains the assignment of all 89 diagnostic windows, window W1 is assigned permanently to the online help function provided by DAMP, windows W2 and W3 are used when a BS2000 diagnosis object is opened, while windows W4 to W9 and W21 to W99 can be assigned freely, e.g. with the SHOW-EDITED-INFORMATION or START-PATTERN-SEARCH statement.
You can control the number, order and length of the windows displayed on the screen with the MODIFY-SCREEN-LAYOUT statement. Any assignment made for a window remains valid even if the window is currently not visible. As an alternative to the MODIFY-SCREEN-LAYOUT statement a window (of the currently valid length) can also be made visible by pressing a P key (windows W1 through W9) or by entering the window number (0 - 9, 21 - 99) in the command line and pressing 
.
For further information on the diagnostic window, see also "Modifying the diagnostic windows".