IBM System/370 Operator's Reference Manual page 208

Operating the 3270 (Cont'd)
NOTE: The following steps test the erase and clear functions.
24. Position cursor under character E in second row of displayed data.
25. Press ERASE EOF key. Characters E through Z should disappear, and cursor
should not move.
26. Press ERASE INPUT key. All unprotected data, including keyed-in characters
and field that originally appeared as INSERT CK should disappear from
screen.
27. If display station being tested has a selector light-pen attached, continue with
step 28. If a pen is not attached, press CLEAR key. All characters remaining
on screen should disappear, and cursor should reappear in first character
position in first row. Press RESET key, and enter the next test message
(steps 1-7 of "General Instructions").
28. Fire pen on detectable field that has a question mark
m
as its first charac·
ter. Ouestion mark should change to a greater-than
(»
symbol. Remainder
of field should not change.
29. Fire pen again on the field. The greater·than symbol should change back to a
question mark. Remainder of field should not change.
30. Fire pen on next detectable field that has a greater-than symbol as its first
character. The greater-than symbol should change to a question mark.
Remainder of field should not change.
31. Fire
pen
again on same field. Ouestion mark should change back to a
greater·than symbol. Remainder of field should not change.
32. Press CLEAR key. All character5 on screen should disappear, and cursor
should move to character location O. Press RESET key, and enter the nexl
test message (steps 1-7 of
"Gener~r
'nstructions").
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