Suppose forensic engineering inspection of a power tool drive mechanism yields the photograph to the left.  What is depicted is confusing to the lay person because it lacks clarifying annotation.  Also, the background is distracting to the eye.  The solution to this problem lies in eliminating the distractions, improving the contrast, and redirecting the eye to only what is necessary.  The viewer’s focus is drawn to the desired components and confusion is eliminated.

Drive Mechanism Visual Aid Example

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