Hi,

i use ubuntu with gnome 3.6.x shell.
Last year, when i tested ubuntu 12.04 for first time, i also installed gnome and once i clicked on Activities, i had several buttons on screen center "Windows | Applications | Extensions"... but i completly forgot what i did to get them there.

Please could you tell me what to do to have them back there in ubuntu 12.10 ?
thx