When opening the help window in OS X, the window will always open and stays on the front. This can be very frustrating, so you can use the following command in Terminal to get the help-center window behave like all other windows in OS X.
Re-activate the Shutdown Dialog
When you press the power button on your Mac (installed with OS X Mavericks or Yosemite) your Mac falls into sleepmode. You can disable the power button’s directly sleep mode and have the ‘old’ shutdown dialog appearing instead, open OS X Terminal window and enter: