Enhanced Cursor Backtab; Error-Correcting Backspace; Enhanced New Line - IBM 3270 User Manual

3.2.8 Enhanced Cursor Backtab
Similarly to the enhanced cursor tab capability just described,
enhanced cursor backtab moves the cursor to the previous tab stop or
to the first unprotected character location of the current or previous
field, whichever is closer. Nulls are not changed to spaces during
the move.
This capability does not wrap the cursor from the upper left to the
lower right of the screen.
While in insert mode, if the cursor is anywhere on the screen except
at the Left Margin position, pressing the Backspace key deletes the
character to the left of the cursor position, and the cursor is moved
left one position. All characters to the right of the deleted character
on the same row within the same field are shifted to close the gap,
regardless of the right margin setting. Attributes and characters to
the right of them are not affected.
If the cursor is at the left margin when the Backspace key is pressed,
input is inhibited and the Input Inhibited and Go Elsewhere
( ,)( . . . . *-+ )
symbols are displayed (in the operator information
area).
Note: When you are working at a 3180 Modell with extended
function (scrolling, etc.), if a cursor is at the home position (upper
left) of the window being displayed, the cursor backspaces out of
the window. This capability does not wrap the cursor from the
upper left to the lower right of the screen.
3.2.10 Enhanced New Line
The New Line key observes the left margin. The cursor is
positioned at the left margin or, if the left margin is protected, at the
first unprotected position to the right of the left margin within the
entry areas. Unprotected null characters on the new line from the
position to the left of the left margin and within the same field as
the cursor are changed to spaces.
Section 3. Entry Assist Capabilities 21