About Estonian letters
Estonian adds õ, ä, ö, ü and, in loanwords, š and ž. The õ is a distinct vowel, not a variant of o.
The Estonian layout has ü, õ to the right of P and ö, ä to the right of L.
On a Mac, Option+N then O gives õ.
Estonian letters: names and codes
Every special letter in Estonian, with the Windows Alt code where one exists, the hex code to type in Word followed by Alt+X, the Mac shortcut and the HTML entity. Click a letter to copy it.