Apple Logic Pro 7.2 - Manual (Page 76)

76 Chapter
2
Logic
Control
 Off—Automation
is
off.
The
fader
will
neither
send
nor
receive
automation
data.
Existing
automation
data
remains
untouched.
It
will
still
behave
as
a
fader,
however,
and
will
adjust
the
volume
or
pan
position
and
so
on
as
usual.
 Read—The
fader
will
read
(follow)
any
existing
automation
data,
but
will
not
write
data,
regardless
of
any
movements
you
make
with
the
mouse
or
external
control
device.
 TOUCH—Writes
new
parameter
changes
when
the
fader
is
“touched”
or
V-Pot
turned
during
playback.
Any
existing
track
automation
data
(of
the
current
fader
type)
will
be
replaced
by
new
movements
as
long
as
the
control
is
active—while
the
fader
is
being
touched
or
V-Pot
is
being
turned.
 LATCH—Similar
to
Touch
mode,
but
the
control
remains
activated,
even
when
the
fader
is
no
longer
being
“touched”
or
V-Pot
being
turned.
In
other
words,
following
the
release
of
the
fader,
the
current
fader
value
will
replace
the
existing
automation
data
for
as
long
as
the
sequencer
is
in
playback
mode.
Press
STOP
to
finish.
 WRITE—Overwrites
all
existing
automation
data,
or
creates
new
automation
data.
Only
use
it
if
you
wish
to
destroy
all
existing
automation
data.
 TRIM—Not
currently
enabled.
Pressing
one
of
the
AUTOMATION
buttons
while
holding
the
OPTION
key
assigns
the
selected
automation
mode
for
all
tracks.
When
an
automation
mode
has
been
selected
for
all
tracks,
the
button’s
LED
will
illuminate
whenever
the
OPTION
key
is
held.
Important:
This
behavior
is
slightly
different
for
the
“Off”
automation
mode,
when
holding
down
the
OPTION
button.
While
doing
so,
all
automation
“writing”
buttons
will
be
turned
off,
but
this
does
not
necessarily
mean
that
all
tracks
are
actually
in
Off
mode—they
could
also
be
in
different
modes.
To
ensure
that
you
have
set
all
tracks
to
Off
mode,
press
READ/OFF
twice
(its
LED
goes
on,
then
off ),
while
holding
down
the
OPTION
key.
Group
Pressing
the
GROUP
button
enters
Group
Edit
mode:
Â
GROUP
button’s
LED
is
on.
 The
Assignment
display
shows
the
currently
displayed
group—“G1”,
for
example.