Thanks. I used the following commands to do xection.
/VIEW, 1, base/2, -base/2, 0
WPLANE, 1, 0, 0, 0, dieL/2, dieL/2, 0, 0, 0, baseT
/CPLANE, 1
/TYPE, , 1
But this only shows one thin slice (wplane). Is there any way to show the part of the object behind the section plane?