Thanks for the prompt reply with detailed help! It worked well and I could have labels on.

I have one more question regarding ROIs generated from SUMA. Is there any way to modify the volumetric dataset of surface-generated ROIs in AFNI? In other words, in your above example with three_rois.lh.s2v.roi+orig, whether you can open three_rois.lh.s2v.roi+orig.BRIK in the AFNI and modify each ROIs using AFNI's ROI GUI. In my ROIs I see some errors in the boundaries of ROIs in 3d volume, probably due to the registration between my surface and 3D volume file, that I want to correct in 3D volume space. I was wondering whether there's a way to change each ROI in AFNI somehow, but so far it seems that the 3d volume file converted from surface ROI file is read as another overlay, instead of modifiable "ROI" files.

Thanks in advance,
Soo Hyun