Hello All, Having brain fades, hence prior empty email, if it got out. I have used unpaper and tesseract on a full page, to good effect, very few errors, but now I want to use on the bottom quarter (roughly) of the next page. This means I was trying to use the --pre-wipe option, but using millimeters for the dimensions appeared to do nothing. Does anyone know the units? Are they the scan pixels, postscript points (72 to the inch) or inches, or something else altogether? i have googled, and read the man page, but have yet to find reference to what units are used for the various options requiring dimensions. There was an inference that adding mm after the number would bring it up as mm, but still decidedly equivocal. Regards, Mark Trickett