Ah yes! Keeps getting confuse with my previous D90!!
So i switch to "S" and scroll left and right?
Which metering mode are you using?
Another case of post a question and disappear.
Well... guess we don't have to answer his questions anymore.
Anyway here goes...
BTW if you are reading this creative-studio, "S" mode is shutter priority mode. Which means you fixed your shutter speed. So...If your ISO is fixed, your aperture will be adjusted to to get the right exposure.
- If the light is too low, your selected shutter speed is too fast, ISO set too low, the aperture cannot open wide enough, you pics will be underexposed.
- If the light is too bright, your selected shutter speed is too slow, ISO set too high, the aperture cannot close small enough, your pics will be overexposed.
Remember, the available range for aperture is not that great, especially if you do not have a very fast lens when shooting in low light, or if you are using a very fast lens shooting in very bright light. Aperture open and closing also affect your DoF. So S mode is not recommended to be used all the time, but only in certain situations. The mode I tend to use the most is A mode. For a beginner like you, you should start with P mode.
Also your selected metering mode will also affect your exposure.
Anyway, I encourage you to read your manual and understand your camera first and also read
this Article first. Understand the concepts and try to apply. If you still have problems, come back here and ask.
If you want a tutor, you can join one of the beginner/basic photography classes offered.