The result you get with images depend on the file format of the image and whether you let Word compress the images. Vector images are uncompressible and retain whatever resolution they're created with. Bitmap images come in a variety of formats (e.g. JPG, TIFF, PNG, GIF) and some of these (e.g. JPG) really aren't suitable for high-resolution text reproduction; allowing Word to compress bitmaps reduces whatever quality they had.

That said, if all you're working with is text, you might consider adding that to a textbox or table cell, which simplifies identification of the range you want to work with.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]