afni.nimh.nih.gov

Hi All,

Hoping for some aesthetic assistance with a brain image. I am trying to create an image with a semi-transparent background for part of the overlay image and non-transparent for the rest of the overlay. Is there a way to do this with the AFNI viewer? (I know you can control the transparency of the overlay as a whole, but I just want to do part of it). I am attaching an example image, where I would like the grey color to be semi-transparent.

Thanks for any advice.

Becky