how to options for keyboard buttons iphone

in keyboard, when you press down some buttons for more than 2 secs, it will give you more options.
here are some examples:

• period or dot button - single dot or 3 dots
• question mark - normal or inverted
• exclamation mark - normal or inverted
• N - gives you Ñ, ñ
• apostrophe and quotation marks - gives you several forms
• dash - gives longer dash and circular dash
• dollar sign - gives you several other currency signs
• zero - gives you degree sign