Windows
Hold Alt and type 7747 on the numeric keypad.
Accents
Copy the character, or use the shortcut that matches your keyboard and app.
All M accentsHold Alt and type 7747 on the numeric keypad.
Character Viewer → m dot below
Type 1E43 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 7747, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+1E43ṃṃ\1E43\u{1E43}Alt + 7747