look and feel option

i am using opensuse 12.1 in gnome desktop
the look and andfeel option is not shown in system setting
please help me

Have a look at this link on the subject: Setting Look-and-Feel Preferences

Thank You,

Use Gnome Tweak Tool. It is probably installed by default.

Also visit
for shell themes.

You might also want to checkout https://extensions.gnome.org and

Cheers Malcolm °¿° (Linux Counter #276890)
openSUSE 12.1 (x86_64) Kernel 3.1.10-1.9-desktop
up 9:33, 3 users, load average: 0.00, 0.01, 0.05
CPU Intel i5 CPU M520@2.40GHz | Intel Arrandale GPU

but i want make this option visible in system setting.
is it bcoz of 64 bit?

It is not intended to be visible there. It is probably an unofficial patch if you have. 64-bit is no different.