I am using a "ListNum" style for my numbering and I cannot get it to restart
numbering?

I am going to Format/Style/ListNum/Format and there is no choice for
restart.  I checked the Format Bullets/Numbering tab and "restart" is grayed
out.

Sample:  (the numbers are my style ListNum)

Sentence goes here:
  1.
  2.
  3.

Sentence goes here:
 4.
 5.
 6.

(I want to restart numbering with each paragraph.  Any ideas?