Samsung NP940X3GK01US, NP940X3GK04US Arms and hands, Hand in almost a straight line, Typing

Appendix
Arms and hands	•	When using the keyboard and touchpad, the shoulders
		should be relaxed. The upper arm and forearm should form an
		angle that is slightly greater than a right angle, with the wrist
		and hand in almost a straight line.
	•	Use a light touch when typing or using the touchpad and
		keep the hands and fingers relaxed. Avoid rolling the thumbs
		under your palms or supporting the wrists on the desk while
		typing.
	•	Use an external keyboard and mouse when using the
		computer for long periods. When using an external keyboard
		and mouse, position the devices at the same height as the
		computer and within comfortable reach.

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