Thank you all,
I think we can close the discussion. I'm not looking for workarounds. As I wrote before I've got a working one.
As I wrote in the first post. I thought I remembered a remark written by Mike somewhere that in one of the updates cropmarks were placed at the edges of the template boxes rather then around the image when using the "Layout: predefined page set" option.
But I guess I'm completely wrong.
I do agree that there's no need to turn Qimage into a dtp package. There's good software for that already.
But IMHO my question is more related to printing than to publishing.
Maybe most Qimage users work with sheets and not wide format printers that work with rolls of paper.
There are enough tools to put images on page that is a single sheet of paper. But on a roll printer the "page" is hardly ever the final sheet. Most of the time you put many "pages" on a large roll of paper. Several times I had to print an entire exhibition of maybe 20 images that had all different sizes, but were mounted in glass frames of the same size.
So maybe Mike would like to consider a special version beside the normal and pro version of Qimage. One that has some special tools to ease the workflow on a wide format printer.
I would have no problem paying for this kind of update. I've been paying an extra bit of money only once in five years, when I upgraded to the pro version. In the past I've seen that Mike is always listening to the users of Qimage to improve it.