<s>
Some	O
CAD	B-Application
software	I-Application
provides	O
a	O
"	O
Snap	B-General_Concept
"	O
pull-down	O
menu	O
with	O
diverse	O
options	O
as	O
preferences	O
for	O
the	O
practice	O
of	O
the	O
operation	O
.	O
</s>
<s>
In	O
Windows	O
,	O
with	O
the	O
option	O
snap	B-General_Concept
enabled	O
,	O
vertical	O
positioning	O
of	O
a	O
window	O
against	O
the	O
top	O
edge	O
of	O
the	O
screen	O
causes	O
it	O
to	O
change	O
into	O
full	O
screen	O
.	O
</s>
