when i am using 'full-auto' and try to reset anything, my camera gives me a message 'not available in this mode'. so it's pretty clear instantly that i need to exit full-auto. you should have a similar 'help'.
it's possible you're getting some kind of msg that is not self-evident: like an error-code/number or flashing/blinking of some indicator.
you also should be able to display the settings for the shot (manual or auto, either way), in view finder or on LCD screen. they won't be visible on the print/final image. but it allows you to monitor the settings while you are experimenting. it can be very useful while you are learning how changing aperture/exposure/mode affects the final result.
