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Display Control
BACK TAB
From the keyboard you can move the cursor backward to the previous tab stop using t h e .
and _
keys (or the _
key in the numeric pad).
In Format mode, the cursor, if within a field, will move to the
be~inning
of the field; otherwise
it will move to the first character of the previous unprotected field only (transmit-only fields
are ignored). The back tab feature is enabled in the User Key and configuration menus.
From a program executing in a host computer you can move the cursor backward to the
previous tab stop using the following escape sequence:
Ec
i
Back tab commands received from the host when the terminal is in Format mode position the
cursor to the previous unprotected or transmit-only field, whichever is encountered first, if
the cursor is at the beginning of an unprotected or transmit-only field or in a protected field.
When not in Format mode, tab stops that do not lie within the area bounded by the left and
right margins are ignored by the back tab function.
The left margin is treated as a tab stop. When the cursor is positioned at or to the left of the
left margin, the back tab function moves the cursor to the rightmost tab stop in the next
higher line.
Performing a back tab with the cursor on the left margin of the first row on the screen (or the
first unlocked row if Memory Lock mode active) will cause the text to roll down one line, if
there is a row above the first row.
DISPLAY ENHANCEMENTS
The terminal includes as a standard feature the following display enhancement capabilities:
• Inverse Video
• Underline Video
• Blink Video
• Half Bright
• Security Video
• Inverse Background
4-22
Black characters are displayed against a white background.
Characters are underscored.
Characters blink on and off.
Characters (or background, for inverse video) are displayed
at half intensity.
Character display is suppressed (this enhancement is used in
conjunction with fields in which passwords, or similar
security-sensitive data, must be entered through the key-
board).
The entire screen is white and displayed characters are black
(with this display enhancement enabled, the effect of the
inverse video function is reversed, so as to produce white
characters against a black background).
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