To insert Greek letters into any variable name or expression, click the appropriate tab, Greek Upper (upper case letters) or Greek Lower ( lower case letters) in the Symbols toolbox, and click the letters to be inserted into the data entry box.
If your Symbols toolbox is hidden, you might want to just type the name of the Geek letter into your expression. The symbol will be inserted after you press enter. To get an uppercase Greek symbol, capitalize the first letter of it's name.
