Windows
Hold Alt and type 336 on the numeric keypad.
Accents
Copy the character, or use the shortcut that matches your keyboard and app.
All O accentsHold Alt and type 336 on the numeric keypad.
Option + E, then O
Ctrl + ', then o — or type 0150 then Alt + X
Insert → Special characters → O double acute
Click the keycap, then paste with Ctrl+V or Cmd+V.
Num Lock on, hold Alt, type 336, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+0150ŐŐ\0150\u{0150}Alt + 336