Question: I use TAB and Shift-Tab in Visual Studio to indent an entire selection. This does nothing in Eclipse, and I can't seem to find another way to do it.

Update: I wasn't really paying all that much attention to this initially and did not ask the question correctly.
I now realized that it is in XML files where TAB still does not indent a selection. I did not find a setting for this in the properties, so I assume it is not possible.

Answer: 
`Tab` and `Shift`+`Tab` are the normal ways to do this in Eclipse, just like in Visual Studio. 

In addition to the keyboard shortcuts, you can also do this from the Source menu. Source -> Shift Left, and Source -> Shift Right. 

Have you checked to make sure tab/shift tabbing is working as you expect in other applications? Is there a stuck key on your keyboard preventing the shortcuts from working? Could another application be stealing the keyboard shortcuts? (as odd as that sounds...)

Also, try restarting Eclipse.
ctrl + i ---> it is for making accurate indentation to a block of source code.