All the knobs and buttons of the Canon EOS Rebel XS/1000D are there to help you take the best possible pictures. Many camera functions are automatic, but you can make adjustments to fine-tune your picture-taking.
The following view of the back of the Canon EOS Rebel XS/1000D shows many of the essential features, including the Exposure Compensation button you use when you think the exposure settings need help and the White Balance button that helps ensure a true white in your photo:
Looking down at the Canon EOS Rebel XS/1000D gives you the following view of the settings to engage before you take a picture as well as the shutter button itself:
On the front of the Canon EOS Rebel XS/1000D are the important focus and flash buttons: