The answer did not solve the paragraph spacing problem.

In my Word2010, I did the obvious: (as an experiment)

At Home, Paragraph, Indents & Spacing, I set "Spacing Before" = 0, "Spacing After" = 24 pt. (eventually want much smaller but this should be obvious.) Then Set as Default, This Document Only, OK.

In document, I entered
Test Line 1 <Shift Enter>
Test Line 2 <Enter>
Test Line 3 <Enter>

Test Line 3 on the screen and printed is one line space, no gap, down from Test Line 2.

Why is Test Line 3 not down 24 points? What is wrong? What else should I do?

I looked at your reference "Basic Formatting Techniques in MS Word". I learned more about Styles but nothing new about paragraph spacing.

Thanks for your help.
BobK