neen wrote:
go to your camera menu, then CMS setup,select full,then go to your custom settings,scroll to the Fn button, and select ISO there. Then you will be able to change the speed quickly with the Fn button, without having to go back into the menu.
OP: For shutter speed, I think you use the thumb wheel on the back (main command wheel), while the aperture is changed with the one on the front (sub-command wheel).