IBM 3270 Manual page 147

5. Press the Alt and CrSel keys to mark the first
corner.
The first corner is marked with a corner
symbol, and this message appears:
Position cursor and use CrSel to define the second corner.
WSCTRL COpy SOURC
6. Move the cursor to the lower right corner of
the text.
Twinkle, twinkle, little star.
How I wonder what you are.
High above the sky so bright.
I wish I could remember the last line._
Since you are moving a block of text, make
sure you place the cursor so that it includes
the long.est line.
7. Press the Alt and CrSel keys to mark the
second corner.
In a host or notepad window, all the text to
be copied is underlined and the four corners
are marked with a corner symbol. In a PC
window, only the corners are marked. The
text is not underlined.
10-4 Book 3 - Using the Control Program