[dbyler]

Here's a hack I found for sizing screenshots. Not ideal, but it works:

1. Create a custom paper size that works with your OO document. (I found 6" x 4" worked for my purposes.)
2. Print your large image as a PDF in the new custom size. Keep your margins as small as possible. The PDF document will be high resolution but constrained to that paper size.
3. Import into OmniOutliner. OO respects the PDF size, so this works well.

Incidentally, it also helps ensure uniformity among your images.

Regards,
Dan Byler