How do I do strikeovers?

[Shirley]

How do I do strikeovers? I want to put a small straight line (-) over a
vowel to indicate the "long" sound of the vowel.

 

[Suzanne S. Barnhill]

You can get information on the overstrike field in Word at
http://sbarnhill.mvps.org/WordFAQs/Overbar.htm, but you don't need that to
print a vowel with a macron or breve. These characters can be found in the
0100-016D range (Latin Extended-A character subset) in the Insert | Symbol
dialog; see http://word.mvps.org/FAQs/General/InsertSpecChars.htm