IBM 3270 Manual page 139

Removing a Window from a Screen Profile
You may have been using a screen awhile, and
you decide that you want to remove a window.
At any time, you can remove any window that is
on one of your screens.
To remove a window:
1. If your work station is not in Control Mode,
press the WSCtrl key.
This line should appear at the bottom of your
screen:
WSCTRL WINDQW=A SCREEN=O
This line shows, for example, that window A
on screen 0 is active.
2. If this is not the screen you want, type the
number of the one you want to change.
That screen profile will appear on your
screen. For example, if you typed 3, the line
will change to:
WSCTRL WINDQW=D SCREEN=3
9-42 Book 3 - Using the Control Program