Hello Freesurfers.

I was wondering of for the purposes of editing wm.mgz if changing voxel values to anything but 255 and 1 will be useful in anyway. If so I was wondering if you can explain to me what the following values mean and how do I use them. 

#define THICKEN_FILL         200
#define NBHD_FILL            210
#define VENTRICLE_FILL       220
#define DIAGONAL_FILL        230
#define DEGENERATE_FILL      240
#define OFFSET_FILTER_FILL   245
#define AUTO_FILL            250
#define PRETESS_FILL         215
#define WM_EDITED_ON_VAL     255
#define WM_EDITED_OFF_VAL      1