By default typo3 Back end layout give Normal,Left,Right and Border.
To hide the blocks i used following code
mod.SHARED.colPos_list = 0,1,2
How to rename the blocks in Typo script:
Normal – Description
Left- News
Right – Publications
Border – Footer
If you’re using TYPO3 4.5+, you can use the new feature called backend layout or grid view.
It is very easy to use. You don’t have to edit PHP-code. You just have to configure it using a wizard.
Joey Hasenau has written a good article at news.typo3.org about how to use the backend layout.
I hope, this facilitates your daily work!