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A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.
For example, the key labelled "Backspace" typically produces code 8, "Tab" code 9, "Enter" or "Return" code 13 (though some keyboards might produce code 10 for "Enter"). Many keyboards include keys that do not correspond to any ASCII printable or control character, for example cursor control arrows and word processing functions.
The KCharSelect character mapping tool shown displaying a subset of the Unicode Mathematical Operators The Unicode logo. Unicode input is method to add a specific Unicode character to a computer file; it is a common way to input characters not directly supported by a physical keyboard.
Use a special-character link to enter a Unicode character. Links are available under Special characters above the edit window, and below the buttons at the bottom of the edit window (for more information on the latter, see Help:CharInsert). Clicking a special-character link enters that character at the current position of the cursor in the edit ...
However, in character encodings used on modern devices such as UTF-8 or CP-1252, those codes are often used for other purposes, so only the 2-byte sequence is typically used. In the case of UTF-8, representing a C1 control code via the C1 Controls and Latin-1 Supplement block results in a different two-byte code (e.g. 0xC2,0x8E for U+008E ...
Category "Cc" control codes can serve a variety of purposes, not limited to format effectors: for example, the default ASCII C0 set includes six format effectors (BS, HT, LF, VT, FF and CR), ten transmission controls, four device controls, four information separators and eight other control codes. [4] Most of these characters play no explicit ...
Ctrl+↵ Enter: ⇧ Shift+↵ Enter [notes 5] or Ctrl+↵ Enter or ⌥ Opt+↵ Enter [notes 5] (may be able to skip some editor-defined input processing) Ctrl+↵ Enter: Insert Unicode: Alt+X + character codepoint ⌥ Opt + character codepoint ("Unicode Hex Input" must be added and active as current input source) Ctrl+⇧ Shift+U + character ...
The original purpose of these characters was to provide a way to shift a coloured ribbon, split longitudinally usually with red and black, up and down to the other colour in an electro-mechanical typewriter or teleprinter, such as the Teletype Model 38, to automate the same function of manual typewriters. Black was the conventional ambient ...