<s>
feh	B-Application
is	O
a	O
lightweight	O
image	B-Application
viewer	I-Application
aimed	O
mainly	O
at	O
users	O
of	O
command	B-Application
line	I-Application
interfaces	I-Application
.	O
</s>
<s>
Unlike	O
most	O
graphical	O
image	B-Application
viewers	I-Application
,	O
feh	B-Application
does	O
not	O
have	O
any	O
graphical	O
control	O
elements	O
(	O
apart	O
from	O
an	O
optional	O
file	O
name	O
display	O
)	O
which	O
enables	O
it	O
to	O
also	O
be	O
used	O
to	O
display	O
background	O
images	O
on	O
systems	O
running	O
the	O
X	B-Operating_System
window	I-Operating_System
system	I-Operating_System
.	O
</s>
<s>
feh	B-Application
offers	O
six	O
different	O
operational	O
modes	O
which	O
can	O
be	O
controlled	O
via	O
command-line	B-Application
flags	O
;	O
apart	O
from	O
the	O
default	O
slideshow	O
there	O
is	O
thumbnail	O
,	O
index	O
,	O
montage	O
,	O
list	O
,	O
and	O
multiwindow	O
.	O
</s>
