<s>
Preview	B-Language
is	O
the	O
built-in	O
image	B-Application
viewer	I-Application
and	O
PDF	B-Language
viewer	I-Language
of	O
the	O
macOS	B-Application
operating	O
system	O
.	O
</s>
<s>
In	O
addition	O
to	O
viewing	O
and	O
printing	O
digital	B-Algorithm
images	I-Algorithm
and	O
Portable	B-Application
Document	I-Application
Format	I-Application
(	O
PDF	B-Application
)	O
files	O
,	O
it	O
can	O
also	O
edit	O
these	O
media	O
types	O
.	O
</s>
<s>
It	O
employs	O
the	O
Aqua	B-Application
graphical	I-Application
user	I-Application
interface	I-Application
,	O
the	O
Quartz	B-Operating_System
graphics	O
layer	O
,	O
and	O
the	O
ImageIO	O
and	O
Core	B-Operating_System
Image	I-Operating_System
frameworks	O
.	O
</s>
<s>
Like	O
macOS	B-Application
,	O
Preview	B-Language
originated	O
in	O
the	O
NeXTSTEP	B-Application
operating	O
system	O
by	O
NeXT	O
,	O
where	O
it	O
was	O
part	O
of	O
every	O
release	O
since	O
1989	O
.	O
</s>
<s>
Between	O
2003	O
and	O
2005	O
,	O
Apple	O
claimed	O
Preview	B-Language
was	O
the	O
"	O
fastest	O
PDF	B-Language
viewer	I-Language
on	O
the	O
planet.	O
"	O
</s>
<s>
Preview	B-Language
can	O
open	O
the	O
following	O
file	O
types	O
.	O
</s>
<s>
In	O
macOS	B-Device
Monterey	I-Device
and	O
earlier	O
,	O
Preview	B-Language
supported	O
the	O
display	O
of	O
EPS	B-Language
and	O
PostScript	B-Language
documents	O
using	O
on-the-fly	O
conversion	O
to	O
PDF	B-Application
format	I-Application
.	O
</s>
<s>
However	O
,	O
this	O
functionality	O
was	O
removed	O
in	O
macOS	B-Operating_System
Ventura	I-Operating_System
,	O
although	O
users	O
can	O
continue	O
to	O
print	O
and	O
files	O
by	O
dragging	O
them	O
into	O
the	O
printer	O
queue	O
.	O
</s>
<s>
The	O
version	O
of	O
Preview	B-Language
included	O
with	O
OS	B-Operating_System
X	I-Operating_System
10.3	I-Operating_System
(	O
Panther	B-Operating_System
)	O
could	O
play	O
animated	O
GIF	O
images	O
,	O
for	O
which	O
an	O
optional	O
button	O
could	O
be	O
added	O
to	O
the	O
toolbar	O
.	O
</s>
<s>
As	O
of	O
OS	B-Application
X	I-Application
10.4	I-Application
(	O
Tiger	O
)	O
,	O
Preview	B-Language
lost	O
playback	O
functionality	O
and	O
animated	O
GIF	O
files	O
are	O
displayed	O
as	O
individual	O
frames	O
in	O
a	O
numbered	O
sequence	O
.	O
</s>
<s>
Preview	B-Language
can	O
encrypt	O
PDF	B-Application
documents	I-Application
,	O
and	O
restrict	O
their	O
use	O
;	O
for	O
example	O
,	O
it	O
is	O
possible	O
to	O
save	O
an	O
encrypted	O
PDF	B-Application
so	O
that	O
a	O
password	O
is	O
required	O
to	O
copy	O
data	O
from	O
the	O
document	O
,	O
or	O
to	O
print	O
it	O
.	O
</s>
<s>
However	O
,	O
encrypted	O
PDFs	B-Application
cannot	O
be	O
edited	O
further	O
,	O
so	O
the	O
original	O
author	O
should	O
always	O
keep	O
an	O
unencrypted	O
version	O
.	O
</s>
<s>
Some	O
features	O
which	O
are	O
otherwise	O
only	O
available	O
in	O
professional	O
PDF	B-Application
editing	O
software	O
are	O
provided	O
by	O
Preview	B-Language
:	O
It	O
is	O
possible	O
to	O
extract	O
single	O
pages	O
out	O
of	O
multi-page	O
documents	O
(	O
e.g.	O
</s>
<s>
PDF	B-Application
files	I-Application
)	O
,	O
sort	O
pages	O
,	O
and	O
drag	O
&	O
drop	O
single	O
or	O
multiple	O
pages	O
between	O
several	O
opened	O
multi-page	O
documents	O
,	O
or	O
into	O
other	O
applications	O
,	O
such	O
as	O
attaching	O
to	O
an	O
opened	O
email	O
message	O
.	O
</s>
<s>
Preview	B-Language
offers	O
basic	O
image	B-Application
correction	I-Application
tools	O
using	O
Core	B-Operating_System
Image	I-Operating_System
processing	O
technology	O
implemented	O
in	O
macOS	B-Application
,	O
and	O
other	O
features	O
like	O
shape	O
extraction	O
,	O
color	O
extraction	O
,	O
cropping	O
,	O
and	O
rotation	O
tools	O
.	O
</s>
<s>
When	O
annotating	O
images	O
,	O
Preview	B-Language
uses	O
vector	O
shapes	O
and	O
text	O
until	O
the	O
image	O
is	O
rasterized	O
to	O
JPEG	O
,	O
PNG	O
or	O
another	O
bitmap	O
format	O
.	O
</s>
<s>
PDF	B-Application
and	O
image	O
documents	O
can	O
also	O
be	O
supplied	O
with	O
keywords	O
,	O
and	O
are	O
then	O
automatically	O
indexed	O
using	O
macOS	B-Application
's	O
system-wide	O
Spotlight	B-Application
search	O
engine	O
.	O
</s>
<s>
Preview	B-Language
can	O
directly	O
access	O
image	O
scanners	O
supported	O
by	O
macOS	B-Application
and	O
import	O
images	O
from	O
the	O
scanner	O
.	O
</s>
<s>
Preview	B-Language
can	O
convert	O
between	O
image	O
formats	O
;	O
it	O
can	O
export	O
to	O
BMP	B-Device
,	O
JP2	O
,	O
JPEG	O
,	O
PDF	B-Application
,	O
PICT	B-Language
,	O
PNG	O
,	O
SGI	O
,	O
TGA	O
,	O
and	O
TIFF	O
.	O
</s>
<s>
Using	O
macOS	B-Application
's	O
print	O
engine	O
(	O
based	O
on	O
CUPS	O
)	O
it	O
is	O
also	O
possible	O
to	O
"	O
print	O
into	O
"	O
a	O
Postscript	B-Language
file	O
,	O
a	O
PDF-X	O
file	O
or	O
directly	O
save	O
the	O
file	O
in	O
iPhoto	B-Operating_System
,	O
for	O
example	O
scanned	O
photos	O
.	O
</s>
<s>
Beginning	O
with	O
Mac	B-Application
OS	I-Application
X	O
10.7	O
Lion	O
,	O
Preview	B-Language
restricts	O
the	O
Format	O
option	O
popup	O
menu	O
in	O
the	O
Save	O
As	O
dialog	O
to	O
commonly	O
used	O
types	O
.	O
</s>
<s>
(	O
GIF	O
,	O
ICNS	O
,	O
JPEG	O
,	O
JPEG-2000	O
,	O
Microsoft	O
BMP	B-Device
,	O
Microsoft	O
Icon	O
,	O
OpenEXR	B-Application
,	O
PDF	B-Application
,	O
Photoshop	B-Operating_System
,	O
PNG	O
,	O
SGI	O
,	O
TGA	O
,	O
TIFF	O
.	O
)	O
</s>
<s>
As	O
of	O
OS	O
X	O
10.9.2	O
,	O
Preview	B-Language
does	O
not	O
support	O
ISO-standardized	O
PDF	B-Application
(	O
ISO	B-Application
32000	I-Application
)	O
,	O
and	O
when	O
saving	O
,	O
destroys	O
aspects	O
of	O
PDF	B-Application
files	I-Application
without	O
warning	O
to	O
the	O
user	O
.	O
</s>
