#### make ROI, or just set $fillneartype ####
-------------------------------------------
funct (left-click):
  fill_nearest_vertices 0 <n>
-------------------------------------------
set (middle-click):
  set fillneartype 0
-------------------------------------------

Fill Closest N Vertices

The "N" button (lower right) selects n vertices
that are the closest in Euclidean distance to the
most recently selected vertex on the currently
displayed surface.

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 on the cortical surface.

The radius of the most distant vertex is reported
in log.  For a standard surface, each vertex
accounts for approximately 1 sq mm.

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

Use a middle click on "N" to just set the value
of $fillneartype (e.g., for write_searchlights)
to 0 (number of vertices).

Use 'Representative Vertices'

Open the Searchlight Correlation popup ("X"
button on label line) or the Searchlight
Operation popup (middle-click SMOOTH) to access
two options that affect the operation of the "N"
button:

  searchlightuniqflag (req's load/samp/uniq 3D BRIK)
  numafteruniqflag

See "Use Representative Vertices" in the R-click
help for the "X" button on the "label:" line for
more details.
