#### make ROI, or just set $fillneartype ####
-------------------------------------------
funct (left-click):
  fill_nearest_vertices 1 <sqmm>
-------------------------------------------
set (middle-click):
  set fillneartype 1
-------------------------------------------

Fill Closest Vertices up to Area (sq mm)

The "A" button (lower right) selects vertices
nearest in Euclidean distance to the most
recently selected vertex on the currently
displayed surface until the requested total area
is reached.

On an inflated surface, this approximates
geodesic distances along the folded surface.

On a folded surface, it will select cortical
surface vertices that intersect a spherical
volume centered at the selected vertex.  In this
case, the selected vertices may not form a single
connected patch.

The radius of the most distant vertex is reported
in log.

To undo this, use UNDO, INIT, or ALL.

Use a middle click to just set $fillneartype
(e.g., for write_searchlights).

Use a middle click on "A" to just set the value 
of $fillneartype (e.g., for write_searchlights) 
to 1 (area in mm^2).

