customizing the menu bar

[abdelkader belahcene <abelahcene@gmail.com>]

hi,
i tried  the testing version wheezy, which runs gnome3.
i want to customize the menu bar   by adding a button ( the arrow on left or right on gnome2) to hide or show the bar.

often i want to use entire screen,  the bar disturb me.

please where can i do it?  the right click on the bar is disabled.??

thanks for help
regards