Microsoft Word: delete blank lines or empty paragraphs

@mutzmatron is right, replacing ^p^p with ^p actually is the proper way.

However, when my documents contains e.g. ^p^p^p^p or similar, it won't pick them all up and will again leave ^p^p. So I've to run this search/replace operation a few times until all cases have been covered.

Another way by using Wildcard:

Tick "Use wildcards" in search and replace window.

search: (^13)^13{1,}.

replace:\1.

^13 is the paragraph mark under wildcard mode. It would search for one paragraph mark followed by at least one other paragraph mark(s). Only keep the first paragraph mark, which marks the end of a non-empty line.