Editing Ergonomic keyboard (section)

===Separation and angling===
'''Hand separation''' means having the left and right hands' parts a distance apart from one-another.
Having an '''opening angle''' between the halves, means that they are rotated apart around an origin located above the keys.

The purpose of separation/angling is to avoid:
* ''ulnar deviation'' — where a wrist is rotated outwards in an unnatural angle, and
* tension in arms and shoulders, by catering to the natural distance between shoulders

There is no standard of where the origin of opening rotation would be located, so the opening angles of different keyboards are not always comparable.

<gallery widths=250 heights=187>
File:Kinesis 130e Essential.jpg | [[Kinesis Contoured]] keyboards have fixed hand-separation but no opening angle
File:Unikey KB-7001 -- top.jpg  | [[Unikey KB-7001]] has a fixed opening angle.
File:Ergodox1.jpg               | By being fully split into two separate halves, [[ErgoDox]] allows both hand separation and opening angle to be adjusted
</gallery>