f you look under the main studio artist windows menu, you will see a Show FullScreen menu command.
That toggles full screen display on and off.
There are preference settings in the General tab of the main studio artist preferences dialog that determine what is shown in full screen display mode. So you can adjust those if you want to get rid of the palettes.
If you just want the painting canvas to take up the entire studio artist workspace window, you can do that as well. Close any existing palettes in the workspace. Then save that workspace configuration in one of the 4 workspace memories.
http://www.synthetik.com/tips/2009/07/configuring-the-workspace/