Hi Bruce,

Thanks for your help. In freeview, the surface outline overlays on the volume correctly, and both the volume and the surface are oriented correctly in terms of R-L, A-P, and S-I axes. In tkmedit, the volume is oriented correctly, but the surface appears to be oriented with some of the axes swapped. E.g., from the coronal view in tkmedit, I see a coronal slice of the volume, but the outline of an axial slice of the surface, with the anterior part pointing down.

John