After setting the launchpad icon size and other setting the launchpad,panel and menu are vanished from the desktop

At first I though you needed to reset the Unity Desktop, but then you say you are using 10.04. I'm a little confused about the DE (desktop environment) you're using because Unity has the "launcher" (not launch pad) but 10.04 doesn't use Unity, unless you've heavily modified your system. Please tell us what desktop environment you're using and provide the output from the following terminal command:

uname -a && lsb_release -a

Thanks,

Chris

Dear Chris,

Thank you for the response to my problem. I have got Ubuntu 10.04 with Gnome Desktop. As you said it is not Launch Pad instead it is Launcher. I tried to resize the icon in launcher with CompizConfig Settings Manager. In that configuration utility apart from resizing the launcher there are other settings also like 3D desktop. I tried to set up that and every thing including the Alt+F2 terminal opening command were deactivated. At present the Desktop picture and and Icons of certain files are only visible. Almost all key board shortcuts are inactive. The other users are undisturbed.

I shall try to run the command from one other user and inform you the result by next message.

Thanking you,
Sapharulla

Dear Chris,

I made a mistake again that is the version of Ubuntu is 11.04 and not 10.04.

Thanks,
sapharulla

OK, Unity then. Press <ctrl><alt>t to get a terminal window with your login

You can reset Unity for your user with

unity --reset

and reset the icons with

unity --reset-icons

more information can be found here:
http://www.webupd8.org/2011/04/how-to-reset-unity-launcher-icons-or.html

Chris

Dear Chris,

Thanks a lot. The problem was solved.

Thanks and bye

Sapharulla