With the batch modify tool, you can do several modifications
1) you can mutliply your data with a factor
2) you can add or subtract an offset
3) you can adjust the (FITS) header for ISO/GAIN/ exposure time, instrument
4) you can undebayer ! so from debayered data, you can create the monochrome CFA data again ! Try it
5) You can crop using offsets, even negative offsets, this will uncrop your data, so you can add a border around your data.
6) or crop, you can draw a crop in the image on your screen and select crop OK