Canon Cat Reference Manual page 27

Adjusting
the
Highlight by Creeping
If
you
creep a certain distance,
the
area covered
by
the
extended
highlight
will
be made
larger or smaller
by
the
distance
you
creep when
you
press both
LEAP keys
to
rehighlight. This is
most useful when
you want
the
highlight
to
include
a
hard-to-reach
character.
Leap
to
an
easy-to-reach character nearby,
creep
over to the
hard-to-
reach character, and
press both
LBAP
keys.
You
can also
highlight, unhighlight,
creep, and
rehighlight
to adjust either end
ofthe
extended
highlight.