Editing Legend (section)

===Four corners===
In the early 1980s onwards, computer keyboards began to sport also a secondary modifier for graphic characters.
The new modifier was called '''Graph''', [[Alt key|Alt]], [[Alt Gr key|Alt Gr(aph)]] or [[Option key|Option]].

To have room for all these symbols on the same key, legends were placed in the four
corners of the top of the key caps.
This scheme was pioneered by [[Digital_Equipment_Corporation|Digital Equipment]] with the much influential [[DEC LK201]]. On the DEC LK201, modifier legends were top/left.
Most other major computer manufacturers mimicked DEC's scheme. One of these was [[IBM]] which used the scheme for its [[IBM Enhanced Keyboard]], with the difference that modifier legends were middle/left-aligned, not top.

:[[File:DEC key legend layout.svg]]

Alphanumeric characters continued to be in capitals, placed in the upper left corner of the key.