1. Open the Admin options for the screen
2. Open the Widgets menu
3. Click Add New Widget
4. Click Add for the Basic Image Widget
5. Choose an image from your computer, and fill out the xPos (how far left/right the image is), yPos (how far up/down the image is), the width and height of the image.
The image will show on the preview image, and will update as you update the values.
In the example below, we have placed the image in the top right corner of the DDB.