[Chimera-users] Intensity range shift

Hello, I would like to ask whether there is a possibility in Chimera to shift the intensity range. I have tomography data, which range from -32000 to 10000 in intensity. A would like to gradually erase parts of the tomogram with volume eraser but it is not possible because the intesity range does not start at zero. It is not possible to do the job with subregion selection. Is there a way to shift the intensity range? Petr