Delphi XE4 has an interesting feature removed from previous versions: the floating VCL form designer. You can enable it again easily, at your own risk.
While the IDE is not running, launch the registry editor, locate the key HKEY_CURRENT_USER\Software\Embarcadero\BDS\11.0\Form Design and set the "Embedded Designer" to False.
Note: Don't do that if you use FireMonkey. It's form designer
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