Unity-2D comes default with Ubuntu 11.10 Oneiric, but previous 2d-desktp setting tool for Ubuntu 11.04 Natty to change unity-2d launcher preferences won’t working any more at here.

In Ubuntu 11.10 unity-2d desktop we can use dconf-tool instead.

To install dconf-editor:

sudo apt-get install dconf-tools

After installation, check unity-2D options with this command:

dconf list /com/canonical/unity-2d/launcher/

you will see something like this:

hide-mode
super-key-enable
use-strut

Now
1.) let launcher always visible:

dconf write /com/canonical/unity-2d/launcher/use-strut true

2.) let launcher auto-hide when a window is placed on top of it and if the user is not interacting with it:

dconf write /com/canonical/unity-2d/launcher/use-strut 0