Thank you pt. I am using afni_proc.py to preprocess resting state images. I am essentially registering the anatomical to the EPI and using non-linear warping for standardization. Some of the images turn out fine but quite a few of them are far off. I was looking for something similar to SPM's function to reset the origin or tilt/rotate the image; this essentially just changes the origin without doing anything to the image. I was reading the afni_proc file and apparently there are a couple of setting that may help (-giant move) when specifying alignment options, but I think doing it manually first before running through the command may be more reliable.

Regards,
George