IBM 3270 Manual page 140

3. If you are not sure of the number, press the
PFI key.
A list of the screen profiles that are in use
will appear at the right side of the screen.
For example,
SCRN:WINDOWS WINDOWS
O:ABCD APC1
1:A
2:BCA
3:DCA
4:
5:
6:
7:
8:
9:
B:HOST1
C:NOTEPAD1
D:NOTEPAD2
4. Type the short name of the window you want
to remove from this screen, or press the Jump
key to make active the window you want to
remove.
5. Press the Alt and Window Delete keys.
g
The window will disappear from your screen,
and the line at the bottom will change to
show the window that is now active.
Chapter 9. Rearranging the Windows 9-43