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To see how these restrictions affect the user see the images below.
These attributes can be combined in numerous ways on many layout elements to provide great flexibility in locking down some aspects of the UI but allowing users to still edit fragment elements. For example, by locking the My Calendar and Bookmarks channels with "moveAllowed = false" and "deleteAllowed = false" and by setting the same values on their column and their tab those channels would be garanteed to always be in the most valuable screen real-estate location, upper left. But users are free to add additional columns and tabs to the right and below these two channels on this semi-restricted fragment.
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