Cropping and editing are possible when adding pictures to the cart and in the “My account” tab.
When adding pictures to the cart, there is the “Preview / Crop” option next to each photo.
In a new window, you will find three tabs in the right upper corner.
The first one is “Framing” in which you can set the picture within the print area.
The next one is "Effects" where you can modify your picture, e.g. by making it black and white or choosing the sepia tone.
The last one is “Frames” – it allows you to add a white frame. The frame will be placed around the picture.
In this case, the photo file gets reduced a little, so that the frame fits within the selected format.