# make_average_subject --subjects Subject1 Subject2 Subject3
"Subject1, Subject2..." etc. are the MRI sub-directories created by Freesurfer. The paths to these sub-directories have to be specified in the environment variables, e.g. "setenv SUBJECTS_DIR /MyMriDirectory/".
Use "--force" to overwrite an existing average brain, "--out" to use an output name other than the default "average".