The relationship between the drawing layer and recticle figure is important:
use ptype substract as an example:
drawing layer recticle clear or dark in recticle
nwell nwell clear
pwell (can generate from nwell) clear
island island dark
poly poly dark
pplus pplus clear
nplus nplus clear
contact contact clear
metal1 metal1 dark
pad pad dark
of course , nplus also can generate from pplus , and filed stop-implant use the
same recticle of nwell . nldd use the same recticle of nplus , pldd use the same
recticle of pplus . In middle step , you can adjust vt for an option etc .