Because most Unicode documentation and the Character Map accessory show the code points in hex, not decimal, a variation of Alt codes was developed to allow the typing of numbers in hex (using the main keyboard for A–F). To enable it, a user must set or create a string type (REG_SZ) value called EnableHexNumpad in the registry key HKEY_CURRENT_USER\Control Panel\Input Method, assign the value data 1 to it, and then reboot or log out/in.[citation needed] A leading + then indicates hex input, for example Alt++11B will produce ě (e with caron).