Hello,

I have volume files (nii file format) in which the values range from -1.7 to 1.7 in 116 ROIs.
I have tried to display the file, but the volume data range can only be set to start at 1.
Therefore, my values under 1 are not seen in the image.
As I know, the volume data can be displayed in the range of 1 to 255.
Then, how can I display the negative values?

I have already read the volume section in the manual, but I couldn't find a satisfying answer.
This may be because I am not yet familiar with the program or missed something simple. 

Could you please explain how to deal with values under 1?
Thank you in advance.

Best,
Eunsong Kang