Xcode 4 Window question

Is it possible to open multiple windows in Xcode 4 if I want to开发者_运维技巧 have multiple files side by side ? Thanks

You can double click a file in the side panel to open it in its own window. You can also hold down command and double click a symbol within a file to open it's definition in a new window.

There is also the assistant mode where you can have two files open side by side (but in the same window).