Windows
Hold Alt and type 7746 on the numeric keypad.
Accents
Copy the character, or use the shortcut that matches your keyboard and app.
All M accentsHold Alt and type 7746 on the numeric keypad.
Character Viewer → m dot below
Type 1E42 then Alt + X
Insert → Special characters → M dot below
Click the keycap, then paste with Ctrl+V or Cmd+V.
Num Lock on, hold Alt, type 7746, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+1E42ṂṂ\1E42\u{1E42}Alt + 7746