The Grave characters: À È Ì Ò Ù à è ì ò ù
Press the following two keys: option ` and then the character we want.
The Acute characters: Á É Í Ó Ú á é í ó ú
Press the following two keys: option e and then the character we want.
The Circumflex: Â Ê Î Ô Û â ê î ô û
Press the following two keys: option i and then the character we want.
The Tilde: Ã Ñ Õ ã ñ õ
Press the following two keys: option n and then the character we need.
The Umlaut: Ä Ë Ï Ö Ü Ÿ ä ë ï ö ü ÿ
Press the following two keys: option u , and then the character we need.