do you mean the section in the left hemi temporal lobe (the lower right portion of your image)? That does not look like real white matter to me as it is adjacent to csf. Did you accidentally put some control points in gray matter (or csf)?

On Mon, 25 Mar 2019, Erika Portera wrote:

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Dear Freesurfer experts,

I have difficulty in introducing parts of white matter inside the superficial pial and white. I used control points and modified the white matter volume but without resolution. Do you have any advice?

Thank you