Merge is a useful graphic utility for overlaying two images in any relative position prior to saving the result to a file.
You can merge the two images in many different ways.
There is an option to fade out one image and fade in the other image towards the edge of the final picture.
It is also possible to smoothly blend in just part of a source image to the final result.
No need to worry about image size differences.
Useful to watermark your favorite pictures.