Finally, here we are at Manual Mode. When you are using Manual Mode you have complete control over your camera. You are 100% in charge of everything, aperture, shutter speed, ISO and everything else. You are also 100% responsible for any mistakes that you make!
Manual mode is not as scary as it may seem. Once you set your ISO and White Balance you can let those settings go to the back of your mind until you need to changed them again. It does not matter if you choose the aperture or the shutter speed first. You will find yourself choosing one or the other first in different situations. As with aperture priority you will want to choose your aperture first if you want to be sure of your depth of field. When you want to freeze or blur action you will want to choose your shutter speed first.
One thing to remember about Manuel Mode is that you can overexpose or underexpose as you like eliminating the need for exposure compensation. In fact, exposure compensation for the camera does not work in Manual Mode for that very reason.