IBM 3270 User Guide

Enhanced Cursor Tab
When you press the Tab key, the cursor moves to the next unprotected tab stop,
replacing unprotected null characters with space characters.^ If there are no
intervening tab stops, the cursor moves to the next unprotected field. Null
characters are not changed to space characters when there are no intervening tab
stops.
The Enhanced Cursor Tab function does not wrap the cursor from the lower right to
the upper left of the screen.
I Note: The Tab key operates differently depending on whether or not document
I mode is on.
! • In document mode with tab stops set, the Tab key can insert data (space
I characters) into the data stream sent to the host program. This insertion is
necessary to preserve the tabular formatting that appears on the screen.
• If no tab stops are set, the Tab key operates in the same manner regardless of
whether document mode is on or off, except that it does not wrap the screen.
Enhanced Cursor Backtab
The Enhanced Cursor Backtab function moves the cursor to the previous tab stop
or to the first unprotected character location of the current or previous field,
I whichever is closer. Nulls do not change to spaces during the move.
The Enhanced Cursor Backtab function does not wrap the cursor from the upper
left to the lower right of the screen.
Error-Correcting Backspace
Press the Backspace key to delete the character to the left of the cursor position.
Your display must be in insert mode.
If the cursor is at the left margin position, you cannot backspace.
I All characters to the right of the deleted character on the same row within the
I same field shift to the left to close the gap, regardless of the right margin setting.
I Attributes and characters to the right of the shifted characters do not change.
If the cursor is at the left margin when you press the Backspace key, input is
I inhibited and the Input Inhibited and Go Elsewhere symbols appear in the
I operator information area.
The Error-Correcting Backspace function does not wrap the cursor from the upper
left to the lower right of the screen.
I 5 If enhanced null/space processing mode is not active, the nulls are replaced with space characters Immediately
I upon receipt of the tab keystroke. If enhanced null/space processing mode Is active, however, the nulls are not
I replaced Immediately, but are eventually replaced If the field is modified and there are graphic characters
I between the tab stop and the end of the field.
3-12 Entry Assist User's Guide

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English