I try to import a PNG which is to become a thumbnail, linking to the larger image. In my image editor, I have on beforehand scaled it to 200 px on the long side to fit the graphic box intended for it. After import, the image fills only a tiny fraction of the box. During import (via the File/Import dialog), no dialog is visible containing the pass-through option mentioned in the Reference. If I open the image in e.g. Preview, it has the exspected size.
I have solved part of the problem: the imported image was 300dpi. When I set it to 72dpi, it is displayed as exspected.
Remains the lack of the pass-through check box.
Kind regards - Henin.