Prerequisites - IBM 3270 User Manual

Note: The Tab key positions the cursor to the next unprotected
field if there are no intervening tab stops. Nulls are not changed to
spaces in this operation.
To facilitate editing tasks, rapid cursor positioning and improved
delete capabilities are available. The cursor may be moved to the
next or previous word with a single keystroke.
It
may also be
positioned to the next or previous tab stop with a single keystroke.
Both capabilities are typematic, allowing rapid positioning of the
cursor anywhere on the screen. The new delete capabilities are a
word delete, which deletes from the current cursor position to the
end of the word; a typematic single-character delete, which
supplements the current nontypematic single-character delete; and a
typematic single-character backspace delete while in insert mode.
The On-Demand Cursor Position indicator causes the position of
the cursor to be displayed in the operator information area in rrlcc
form, where rr and cc are row and column numbers, respectively.
Note: When a document is created by use of Entry Assist's
formatting facilities (margins, tabs), it cannot be automatically
reformatted at a later time by the simple changing of an Entry Assist
format control. (See heading 4.2.6 for further discussion.)
1.2 Prerequisites
The 3274 Entry Assist function is available on the display units
identified in Appendix A when these displays are attached to an
IBM 3274 Control Unit configured for Configuration Support D
and customized to enable Entry Assist.
The 3274 Entry Assist function is supported on typewriter, APL,
and RPQ 8KI038 keyboard layouts only. Some keyboard key tops
need to be replaced with new keytops or relabeled with stick-on
labels to identify the unique Entry Assist capabilities. (See Section 2
for installation instructions.) Users can purchase an Entry Assist
Key top Replacement and Accessory Kit (for 3278 and 3279
keyboards) containing eight sets of five replacement keytops and a
key top extractor tool. .
The audible alarm feature is required on the 3278 and 3279 displays
to implement the audible 'end of line' signal capability.
Section 1. Overview
3