Editing Layer (section)

==Software layers==
The most basic layer is the distinction between lowercase and uppercase in many languages, as well as the upper row on the remaining keys on the keyboard. Holding down the [[shift key]] activates a second layer which provides capitals, alternative symbols, and numerals in French language layouts.

[[Macintosh]] computers typically have a total of four layers, using the additional [[option key]] which doubles the number of available layers, as it can be held in conjunction with shift.

Software layers are controlled by the operating system or firmware and have no bearing on the keyboard itself. The operating system has to be instructed as to what type of keyboard is connected and what the behaviour of the shift key is to be.