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Generally, it brings up a help menu.
When you need to use the keyboard it will appear if you use the x key over the spot that requires typing. In other places like in Playstation Home the Option key (triangle shape) brings up the keyboard
Why the window key in keyboard?
ALT+N is an accelerator (a keyboard shortcut). It's function is dependent upon the context in which it is used. In Windows, the ALT key brings focus to the active application's command menu while the N will highlight any top-level menu that has been assigned the N accelerator. In Visual Studio, for instance, ALT+N brings focus to the Visual Studio IDE's ANALYZE menu. But if the desktop has focus, ALT+N does nothing because it is not a designated accelerator for the desktop.
On a windows computer, try any of these key combinations: Ctrl-Q Esc Ctrl-Alt-Delete (brings up the task manager - you can force a quit from there)
If you press Alt + Home key, it brings you to your home page. yes , also a home key, the actual object provides security!
keyboard
If your keyboard is missing a key, press the key-less spot very lightly when used, or try to place the key back on, or at best get a new keyboard.
COMPUTER KEYBOARD KEY MEANINGS
To make an apostrophe on a keyboard, press the key beside the "enter" key on the right hand side of the keyboard.
It is usually on the key above the Enter (or Return) key on the keyboard.
The f key on a keyboard is located between the d and g keys.