To write the Greek Small Letter Eta With Dasia And Ypogegrammeni symbol ᾑ on keyboard using ALT codes; ALT+8081, just hold down the ALT key while typing the alt key code 8081. You have to use the n♊umeric keypad of your keyboard. If you do🦩n not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.