Vertical Positioning Keys. Operating the two vertical cursor positioning keys
(up
t or down t ) moves the cursor in the direction
of
the arrow, one line
at a time. The keys are typamatic to allow you
to
move the cursor any
number
of
lines quickly and with only one depression
of
the key. If a vertical
positioning kcy
is
held down, cursor wrap occurs. In this casc, the cursor
reappears in the same character position,
on
the opposite edge
(top
or
bottom
line)
of
the screen
that
it occupied before moving
off
the screen.
Backspace Key. Pressing the Backspace key moves
the
cursor one location
to
the left for each depression
of
the key. This key operates exactly like the
horizontal (left) positioning key and also
is
typamatic. (This duplication
of
key function
is
provided for operator convenience.)
Ompter
3.
Keyboards
3-31
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