How to use your camera ?

Have you decided today that it's high time you learned what all those buttons on your digital SLR actually do?
As you tinker with the settings, you want to take some photos to see what effect each setting has.
Quality Setting: Small Low (high compression)

In this situation you probably won't be printing any of the images that you take, and you'll almost certainly be deleting half of them.
You also want to transfer the images quickly from memory card to computer so that you can review them on your monitor, and the small image size helps with this (10 megapixel files are slow to transfer and slow to open in an image-editing program).