Canon Cat Reference Manual page 35

If
you don't
care to keep the
underlying calculations in the
copied-up text,
do the
following:
Copy up the
text.
Use
lcoPYl
to copy the
highlighted text.
Unhighlight. High-
light
and
erase
the
original
ofthe
text
youjust
copied.
This
wipes out the copied up calculations.
Backups
A backup
disl< is an
exact copy
of another
disk. It
is
a
good
idea
to
keep at least one
backup copy of every important
disk
as
insurance against accidental loss or damage.
As
far
as
the Cat is concemed, backup
disks
are
indistin-
guishable
from
one
another. This
means
you can record
the same
text on
as
many
different disks
as
you like,
as
long
as
the
disks
are
backups.
Only
a
blank disk can
be
used
to
create
a
backup.
Proceed
as
follows:
-
The text may
be
either
clean or
dirty.
To synchronize the
texts
it
is preferable to have a clean
text
(happy
cursor).
The cursor should not have been
moved since the text was
last recorded.
-
Place the
blank disk in
the
drive.
-
Use
[SHIFT]-[DISK]:
Hold
[USE
FRONT]
and
[SHIFT],
and
while holding
both keys, press and release
[DISK]. The
Cat records
your text
on the
blank disk.
The backup
disk
and the other
disk
are
now indistinguishable
as
far
as
the
Cat is concerned.
You
can make as many backup disks as
you
desire by
repeated use
of
[SHIFT]-[DISK].
If you attempt
to make
a
backup
recording
on
a
disk that is
not blank, the Cat
will
beep, and,
as
described
in
Peeking
at a
DiskThatDoesn't Match,page26,allow you
to
seethe
text stored on
the
disk in
the
drive.
Ifthe
disk in
the
drive
is not a
Cat disk, the
Cat
usually
beeps. See Disks
From
Other Systems, pages 26-27,
for
more information.
Using Backup Disks
After using
[SHIFT]-[DISK]
to
create a backup
disk,
use
[DISK]
as
usual to keep
it
up to
date. This
means
recording
your text, putting
the backup
disk in the drive, then using
[D|SK] again to record on
the
backup. Since the
backup
and
original
are
identical,
the
order
the
disks
are
recorded
in
doesn't matter.
You can make
as
many backup disks
as
desired. The
only
restriction
is
in
the
number of
times you
can
play back
and
record on one
disk
without making
recordings on the
other
disks.
If
you make
3
I playbacks
and
recordings on
a
single
disk
without
recording on the
backup disks, the
connection
between
this disk
and
its
backups
will
be broken. No
information
will
be
lost
as a
result.