To create a simple gradient:
1. Click on the null category and create a new quads.
2. Add the quad to the map by clicking the "Add Quad" button.
3. Click on the corners to change the colors.
To create a background with a custom image:
1. Create a quad in the top category.
2. Click "Layers" to go to the texture tab.
3. Click "Add" to add your texture.
4. Select the texture (Pre-install), and click "Add".
5. Click "Images" twice to go back.
6. Click in the "Image" field and select the desired texture.
7. "Add quad."
Done ^^
