IBM 3270 Manual page 120

Changing the Color of the Screen Behind
the Windows
To begin:
1.
Press the WSCtrl key.
This line should appear at the bottom of your
screen:
I
WSCTRl
2. Press the Screen key (PF22).
The line at the bottom of your screen changes
to:
Select the color setting desired by using the color coded keys.
WSCTRL SETUP COLOR SCBK
3. Press the Alt key and one of the Color keys
(PF13 through PF20) to choose the color you
want.
4. If you don't like the color you chose, press
the Alt key and a different PF key.
5. When you have the color you want, press the
Finish key.
You can now change parts of windows. Press
the PF key for the part you want to change.
6. If you are finished changing colors, press the
WSCtrl key to go back to using your
windows.
You are done.
Chapter 9. Rearranging the Windows 9-23