where is the @ on a german keyboard
German keyboard layout The characters ², ³, {, [, ], }, \, @, |, µ, ~ (and, since the late 1990s, €) are accessed by holding the AltGr key and tapping the other key. The Alt key on the left will not access these additional characters. Alternatively Ctrl+Alt and pressing the respective key also produce the alternative characters on some operating systems.
Keyboard layout Instead of the Alt and AltGr keys, Apple Keyboards have ⌘ Cmd (command) and ⌥ Option keys. The ⌥ Option key is used much like the AltGr, and the ⌘ Cmd key like the Ctrl on IBM PCs, to access menu options and shortcuts. Macs have a Ctrl key for compatibility with programs that expect a more traditional keyboard layout. It is especially useful when using a terminal, X11 (a Unix environment included with OS X as an install option) or MS Windows. The key can generally be used to produce a secondary mouse click as well. There is also a Fn key on modern Mac keyboards, which is used for switching between use of the F1, F2, etc. keys either as function keys or for other functions like media control, accessing dashboard widgets, controlling the volume, or handling exposé. Fn key can be also found on many IBM PC laptops, where it serves a similar purpose.