Did you know that many keys on the small iPhone keyboard are hiding additional characters? To type an O with an umlaut, for instance, press (lightly) and hold the O key, and a popover appears with accented variants of O. Without lifting your finger, slide it over the Ã– and then pick up to insert that character. This trick is also useful for getting different dashes (under the Hyphen), different currency symbols (under the $), curly quotes, and more. The most interesting one? When the Period key appears on the main keyboard screen, as it does in Safari or Mail when entering a URL or email address, press and hold on the Period, and you can quickly select from .us, .org, .edu, .net, or .com to finish the address youâ€™re typing.