To write the Cyrillic Capital Letter Barred O With Diaeresis symbol Ӫ on keyboard using ALT codes; ALT+1258, just hold down the ALT key while typing the ⛎alt key code 1258. You have to use the 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.