With the release of FileMaker 10, the “Set Layout Order” command, which had quietly lived under the Layouts menu for countless generations (only accessible from layout mode), was moved from its comfortable home and given a new name: Manage Layouts
One advantage of this change, was that the command could be accessed from any mode, rather than just when in layout mode. But apart from that, no additional functionality was added above and beyond what had been available in FileMaker 9.
The good news is that Manage Layouts has become much more useful in FileMaker 11, and now, truly does what its name implies, as per the buttons along the bottom of the dialog.
My favorite of these by far, incidentally, is the ability to highlight one or more layouts and then open each of them in a new window. I find this to be a huge time saver.