[Freesurfer] control points and voxel segmentation stats

Hi,

I understand that it is possible to use control points to fix intensity normalization, so that volumes which were not selected as white matter can be manually selected as white matter. Is it possible to "de-select" volumes which were determined as white matter in freesurfer, even though it is not (these volumes are part of the cortex). In general, is it possible to manually select certain volumes and assign them a segmentation label/value that seems more correct?

Is there a way to obtain an output (.txt or .xls?) file that gives the segmentation label/value of each voxel on top of mousing over the voxel in tkmedit to obtain the segmentation label?

Thanks!

Regards, Trina Kok