
I am going to
crop this image to try and make a better
focual point of the photo.

This is what I decided to
crop out of the image to make to the
focus on the horizon on top of the moutains.
Cropping tool
You can use the cropping tool to improve your photo by cutting out bits of the photo you don't want. for example you could have a tree to one side that you don't want and you can crop that out of the picture. You have to consider though when using the cropping tool is that is it going to really make an improvement on your photograph and that you are not actually taking out something that is eye catching out or meaningful to the photo. Also always save the original first so if it goes wrong you can always go back.
Levels
A histogram is a graphic representation of the range of tones from dark to light in a photo. Some digital cameras include a histogram feature that enables a precise check on the exposure of the photo.
An under-exposed image is one that has to much exposure to light
An over-exposed image is one that doesn't have enough exposure to light
A correctly exposed image is one that has the right balance of light
The difference between a 'high key' and 'low key' image is that a high key is a bright picture with low contrast and a low key image is a lot darker and also have a high contrast.
Levels can improve your image by adjusting the brightness and contrast if its not right, and improve tonal range and remove flat spots.
You can use the magnetic wand which you go around the area you want to edit , which makes another layer and shows you where you are working.