The keyboard – How do I use keyboard and mouse?
The keyboard should be placed centrally in front of you. It should lie flat on the desk and the keyboard feet should remain folded; a palm rest can be useful. These adjustments allow a comfortable position of your wrist: a hand tilted upwards causes muscle tension. The wrist should be relaxed, straight and not twisted. A straight wrist shows relaxed muscles just as in playing the piano. The piano keys are horizontally arranged, allowing the fingers to move with a loose, straight wrist.
An upward tilt of the keyboard could only be useful for computer work when during typing you have to look at the keyboard. Then the angle of the gaze is more comfortable than when the keyboard lies flat. But in this case, a palm rest should be used to reduce strain in the wrist.
Place the keyboard rather close to you, so that you can rest your forearms comfortably on the desk or on the arms of the chair.
The computer mouse should also be placed rather close to you, to ensure a comfortable position of the arm on the desk and to avoid tension in the neck and shoulders.
Hints on choosing the right keyboard and mouse can be found HERE