HI Dana and Jon:
I am using a PC and Windows 7.
I have taken to running proof prints on my 2880. I use such prints to judge tones and edits before making final prints on an 11 1/2 x 17 inch of paper. The native aspect ratio of the Leica M Monochrome file is 8 x 12. So I resize my image to fit on the "proof paper". I have noticed whitish bands along the short side of the proof prints. Not dark enough so that I cannot judge the tone, but just enough so that I cannot use the file for smaller prints. When the file is printed at 8 x 12 on the 11 1/2 x 17 inch paper there are no bands at all. Also, when I resize the Leica file so as to print with larger margins ( with the result being a much smaller print! ) on the proof paper there are no whitish bands Perhaps the margins are the issue, but why?
What is the reason that one must have larger margins? In QTRgui the minimum margins required are well below 1 inch. If I follow the QTR paradigm I get whitish bands!