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I was going through one article here and the topic was "Changing the Size and Appearance of the Unity Launcher" which required to open up CompizConfig from System Settings --> Desktop. I could find System Settings and could reach to control panel but cannot locate either Desktop or CompizConfig. When i go to Software center and search for compizconfig, it says that it is already installed.But when i search it from the list of installed applications, i couldn't find it.??

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Try running it from the Terminal: ccsm Does it pop up? – adeklipse Jun 29 '11 at 12:35
what does it say when you open terminal and type there ccsm – Denwerko Jun 29 '11 at 12:36

CCSM (compizconfig-settings-manager) is not installed by default. To install it go to the Software Center or click on the link below:

compizconfig-settings-manager Install compizconfig-settings-manager

Then you can open it by typing ccsm in the Dash or run it from System Settings

Warning: ccsm can lead to unwanted effects that may be hard to overcome and may leave you without a desktop (see also this question for more background information).

You may have installed simple-ccsm instead.

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He clearly mentions that Ubuntu Software Center says it's installed. – Oxwivi Jun 29 '11 at 14:29
@Oxwivi: CompizConfig(simple-ccsm) != CompizConfig Settings Manager (ccsm) – Takkat Jun 29 '11 at 15:03
Ah, that you should have mentioned earlier. – Oxwivi Jun 29 '11 at 16:06

Try accessing Compiz Config Settings Manager (or ccsm) by pressing Alt+F2 and typing ccsm. The Unity settings are in there, just type "unity" into the search bar.

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In the Applications lens (at the launcher), on the extreme right of the search bar, you will see "All Applications" written along with an arrow. Click n it and choose "System". You should be able to see CompizConfig Settings Manager there.

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