How do I insert Greek characters from the character viewer in Lion?

Did you try the option key?

œ∑´®†¥¨ˆøˆøπ“åß∂ƒƒ©˙∆∆˚¬…æΩ≈

Click the gear icon to edit your list:

Select Customize List:

and check "Greek"

I used greek fonts when I was doing my masters studies. Currently I use them when I teach biblical and language classes. I accessed Greek fonts in the same manner as when I had OS X Tiger.

Open System Preferences

Click on Language & Text

Click on Input Sources

Click the box by Greek or Greek Polytonic

Click the "Allow a different for each document" and "Show input menu in menu bar" at the bottom of the window.

Click the American flag in the menu bar at the top of the screen and a Greek flag will take the place of the American flag. You now have greek fonts instad of english. To switch back simply click the flag again and choose the American flag.

Very helpful! Thank you.

it is easier just to hold the option key it will automatically make about half your keyboard Greek z it being the sign for Omega å∫ç∂´ƒ˙˙ˆ∆˚¬µ˜øπœ®ß†¨√ ΩΩΩΩ just adding to LeroyDouglas because i didnt get the coment at first

this guy 555555 wrote:

it is easier just to hold the option key it will automatically make about half your keyboard Greek

No, it really only makes 7 Greek characters ( ∑π∂∆Ωµ∏ ) out of 48 and not the α which janopus said he required 3 years ago.