Windows
Hold Alt and type 7770 on the numeric keypad.
Accents
Copy the character, or use the shortcut that matches your keyboard and app.
All R accentsHold Alt and type 7770 on the numeric keypad.
Character Viewer → r dot below
Type 1E5A then Alt + X
Insert → Special characters → R dot below
Click the keycap, then paste with Ctrl+V or Cmd+V.
Num Lock on, hold Alt, type 7770, release Alt.
Use the Unicode, HTML, CSS, or JS value below in documents and stylesheets.
U+1E5AṚṚ\1E5A\u{1E5A}Alt + 7770