[Bob S[_2_]]

I use Word 2003. When I receive a document from others at times there is a
large amount of space (like 3 lines) betweeen paragraphs. How can I reduce
that amount of space between paragraphs.
Sometimes, there is too much space between lines as well, even though when I
check it seems to be just single spacing. Is there a way to change this as
well?
Thanks in advance for your help.
Bob