To put an image against your product there are 2 3 ways of doing it, please use what works best for you.
...
To begin you can be in either List or Normal View
Right click the product and select Capture Ref Image from the menu.
Ensure the image you would like to screenshot is open on the same screen and click and drag around the area of the image and it will grey the area that you are capturing (see below). Once you release your mouse the image will then appear on the style.
Your final result will look like this.
Option 2 - Drag and Drop
To begin you can be in either List or Normal View
Locate your image in your files on your computer and drag and drop the image directly onto the image of the style. The image will then automatically appear.
...
Option 3 - Capture image from image view
This is only applicate if style has no image yet
Click on the Capture at the upper right
...
make sure image is ready on the other side
...