"I can understand your confusion but read the manual...In addendum lots of nice forum members to help and no such thing as a dumb question.."
TTF, I agree with the two above statements and your overwhelming feeling BUT the X-Terra 70 in reality is easy like Swiss Cheese, honestly hardly nothing to it. You are now just initially looking at the scary manual like I did when I first got mine that makes it falsely look about 10 times harder than really is the the real world. It is so simple a young pre-teenage person can be taught and run it in a day, with hands on instruction. Not a fraction of and not nearly as complicated as it first looks by any means. In a week or so you will probably zip through the controls with no problem.
BUT what takes the real-much longer time and learning is the practice on recognizing tones-sounds, interpet what the machine is telling you, swing over the target from different directions, deciding on what settings to use to match the area you are hunting in, your swing techniques, how to pinpoint, determine the size not only approaching from different angles in Prospecting Mode but including by lifting the coil up high(I do not have the 705's new pinpointing feature), etc.
And remember you are not dumb, there is just no such thing as a dumb question...do not try to remember everything at once, trust your mind it will keep it in store for you for the next time, one thing focused at a time. Also doing it twice, three times, etc. will sink it in further and better. We learn from things going right of course but learn even more things going wrong, from messing up, and your mistakes as a blessing, as that is the right normal proceedure, on how we ALL mostly learn, instead of getting pissed off and mad all of the time. Things will go much smoother and smoother once you work out more and more bugs and it will then become more pleasureable and enjoyable . If you keep doing the same thing don't expect different result, try a different way. Work hard and be persistant but also know when to quit when enough is enough.