Shift key
Many shortcuts require two or more keys to be pressed together. For these, the usual notation is to list the keys names separated by plus signs or hyphens. For example: "Ctrl+C", "Ctrl-C", or ". The Ctrl key is sometimes indicated by a caret character (^). Thus Ctrl-C is sometimes written as ^C. At times, usually on Unix platforms, the case of the second character is significant – if the character would normally require pressing the Shift key to type, then the Shift key is part of the shortcut e.g. '^C' vs. '^c' or '^%' vs. '^5'. ^% may also be written ".