You can choose alternative techniques for positioning your images through the 'background settings' menu:
There are 3 different ways that you can position your background image:
1. Repeat: a single image will be repeated to fill the area of the page
2. Stretch: a single image will be stretched until it fills the area of the page
3. Position: a single image can be placed anywhere on the page. Use the sliders to adjustment the plaecment of your image.
Related article: What is a background image?