If you need to call up the OSD of the camera you are controlling, please just call preset 95. This will bring up the OSD from the Joystick. You can then navigate the menu using the joystick and the enter button to change things in the OSD (you need to exit the preset menu from the HC-Joy G2 before the enter button will work). If you need to go back in the OSD, you can press the Iris minus button. This will go back as well as exit the OSD.
I hope this helps!