running ubuntu 12.04 - all well after installation -
looking for some options in compiz do organize expo and other desktop stuff, now
systray-panel (= program-menus cant be shown and icons unvisible and no logoff,...)
is not drawn at the top of screen/desktops
the launcher at left doesnt appear while moving mouse to then left
any programs can only be started via command-line by getting a terminal with ctrl-alt-T

how can I start/show it again?