Run 'real VNC Viewer' in full screen mode Full Screen Mode
After updating to Yosemite you can now run applications in 'Full Screen Mode' (Application runs in full screen without the OS X toolbar at the top) if it's supported.
Problem
I am running 'real VNC viewer' to access my Raspberry Pi's screen over the network. The only issue is when I put 'VNC viewer' into full screen I still have the OS X toolbar at the top. Is there a way how to fix this?
Before solution

As you can see, the toolbar and window buttons (quit, minimise and full screen) are visible.
After solution (What I want)

The OS X toolbar an window buttons have now gone.
Is there a way on how to do this?
VNC viewer has it's own 'full screen' mode.

To access it, move your mouse to the top of the window (where the arrow is pointing) and click the full screen icon.

The only issue with this is you cannot view multiple desktops (using the trackpad gestures) without closing full screen mode.

To toggle full screen mode quickly you can press F8 (fn+play/pause) then when the menu pops up press F