Microsoft Word Greek Letters for Scientific Research Papers.

Use Word’s Equation Editor: Use a built-in accent character

1. Go to the Insert tab > Symbols group (far right), then click Equation.

2. Select Insert New Equation from the bottom of the list.

This opens the Equation Tools > Design tab and puts a Type equation here box into your document.

3. Click Accent on the Design tab > Structures group.

4. Scroll down past the Boxed Formulas section to the Overbars and Underbars section.

5. Click the Overbar icon.

You’ll see something like this in your document

6. Click in the dashed box, then type D.

7. Click outside the equation box to hide it; you can show it again by clicking on the D with the macron.

Your character will look like this: