Hi,
You can use the following image as a template. Right click on it and choose to save it.
When you have the template you can scale and arrange your photos over the black areas. This matches what appears in your flat jigsaw. The white areas are cropped off. If your photo doesn't fill all the black area you will want a nice background texture or another photo to fill the black gaps. In a future version I hope to automate this so it scales and centres your photo over a standard background.
