Hi Stefano,

The thing to know about PDF output from MoI is that it's padded by 18 pt (4.23 mm) on left/right and 12 pt (6.35 mm) on top/bottom. You can get output of predictable size by making the bounding box of all the objects coincide with the aspect ratio of the usable part of the exported page. I do that by drawing a bounding rectangle around what I'm exporting.

For 8.5 x 11 inches it works out very cleanly that a rectangle having an aspect ratio of 3:4 is perfect.

- Peer