<s>
Xfig	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
vector	B-Application
graphics	I-Application
editor	I-Application
which	O
runs	O
under	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
on	O
most	O
UNIX-compatible	O
platforms	B-Device
.	O
</s>
<s>
In	O
Xfig	B-Application
,	O
figures	O
may	O
be	O
drawn	O
using	O
objects	O
such	O
as	O
circles	O
,	O
boxes	O
,	O
lines	O
,	O
spline	O
curves	O
,	O
text	O
,	O
etc	O
.	O
</s>
<s>
It	O
is	O
also	O
possible	O
to	O
import	O
images	O
in	O
a	O
number	O
of	O
formats	O
,	O
including	O
JPEG	O
,	O
EPS	B-Language
,	O
PostScript	B-Language
,	O
and	O
SVG	B-Application
.	O
</s>
<s>
Xfig	B-Application
saves	O
figures	O
in	O
its	O
native	O
text-only	O
"	O
Fig	O
"	O
format	O
.	O
</s>
<s>
Xfig	B-Application
has	O
a	O
facility	O
to	O
print	O
figures	O
to	O
a	O
PostScript	B-Language
printer	O
,	O
too	O
.	O
</s>
<s>
A	O
convenient	O
feature	O
is	O
the	O
PSTricks	B-Language
or	O
PGF/TikZ	B-Operating_System
packages	O
code	O
that	O
allows	O
a	O
smooth	O
integration	O
of	O
Xfig-generated	O
images	O
into	O
LaTeX	B-Application
documents	O
.	O
</s>
<s>
However	O
,	O
through	O
the	O
EPS	B-Language
export	O
facility	O
,	O
figures	O
can	O
be	O
imbedded	O
into	O
groff	B-Application
documents	O
also	O
,	O
when	O
rendered	O
to	O
PostScript	B-Language
,	O
e.g.	O
</s>
<s>
Most	O
operations	O
in	O
Xfig	B-Application
are	O
performed	O
using	O
the	O
mouse	O
,	O
but	O
some	O
operations	O
may	O
also	O
be	O
performed	O
using	O
keyboard	O
accelerators	O
(	O
shortcuts	O
)	O
.	O
</s>
<s>
The	O
interface	O
is	O
designed	O
for	O
a	O
three-button	O
mouse	O
,	O
although	O
it	O
is	O
also	O
possible	O
to	O
use	O
a	O
two-button	O
or	O
a	O
one-button	O
mouse	O
with	O
appropriate	O
emulation	O
,	O
for	O
example	O
on	O
a	O
Macintosh	O
under	O
OS	O
X	B-Operating_System
.	O
</s>
<s>
Xfig	B-Application
was	O
written	O
by	O
Supoj	O
Sutanthavibul	O
in	O
1985	O
for	O
SunView	B-Library
.	O
</s>
<s>
Ken	O
Yap	O
ported	O
xfig	B-Application
to	O
X11	B-Operating_System
.	O
</s>
<s>
Xfig	B-Application
can	O
import	O
various	O
files	O
as	O
images	O
:	O
</s>
<s>
Xfig	B-Application
can	O
export	O
into	O
various	O
formats	O
:	O
</s>
<s>
Formats	O
for	O
printed	O
documents	O
:	O
PostScript	B-Language
,	O
PDF	B-Application
,	O
HP-GL	B-Language
(	O
printer	O
control	O
language	O
used	O
by	O
Hewlett-Packard	O
plotters	O
)	O
,	O
</s>
