The Rehash button in the User Menu will rebuild the User Menu, taking script and menu files found along the script search path and creating the corresponding entries in the User Menu. This command should be executed if a new script is added to the path. It is implicitly executed whenever the script path is changed. This function will also load the contents of files named ``library'' found in the script search path. These files contain function definitions only. Like the Debugger button but unlike other buttons in the User Menu, this is an internal command.