Just now ,Greg Maxey (gmaxey@mvps.org) answered my
question about "how to change line at specific place?"
But unfortunately, I could not understand his answer. What
is the meaning of sentences : Type ([0-9]{2})"and a tap of
the spacebar" in the find what field.   Type \1^13 in the
replace with field and select replace all.
Firstly , I typed a exact number and a tap of the spacebar
in the find what field and typed  \1^13 in the replace
with field . But it failed to accomplish the task.
Secondly, I typed ([0-9]{2}) and a tap of the spacebar in
the find what field and typed  \1^13 in the replace with
field . It failed again.
My purpose is to have a  paragraph mark at each pair of
number, thus deviding each pair  into a new line.
I have tried to send a email to Greg Maxey
(gmaxey@mvps.org) and failed .
Would you kindly please to give me further explanation ?
My email address is   sunchao30_1@hotmail.com
Thank you.
Sun Chao.