When I tried to print several files on a windows machine at once the orientation remained portrait although some of the files were landscape. This resulted in only the (left) portion of the horizontal picture that fit in the width of the vertical sheet being printed, while the bottom portion of the sheet was left blank.
Sequence of events:
File open
- choose two files, the first portrait and the second landscape, using ctrl - left click
- right click on the second file
- choose print
- image size: fit pixels
- page orientation:automatic
- unit:mm
- gamma 1.00
>print