Hi wofgang,
Is there a way to do this with QIMAGE or should I prepare the image outside of QIMAGE e.g. using Photoshop or similar picture editor?
Yes and No!
It's very easy to do in QU with borders, it's a basic print function.
Place the image in the queue at the size required.
Select and open the Print properties.
Specify you border dimensions: Border 1 as white and Border 2 as black.
Select B or B+ depending whether you want the borders not to increase the print size with B or B+ if the boders are to be added on to the print size.
See screen shot below.
Terry