To write the Greek Capital Letter Eta With Psili And Oxia And Prosgegrammeni symbol ᾜ on keyboard using ALT codes; ALT+8092, just hold down the ALT key while typing the alt key code 8092. You have to use t🐬he numeric keypad of your keyboard. If you don not have numeric keypad, hold down the Fn and ALT keys while typing the alt code number.