Freedom Scientific RUBY User Manual page 9

Magnifying with RUBY
How far you hold RUBY from an object determines the level of magnification.
Placing RUBY with Handle Closed on a Document

The starting magnification is 5X when you place RUBY directly on a
document with the handle folded closed.

Press the yellow button

Press again to increase to 10X magnification.

Press a third time to return to 5X magnification.
once to increase to 7.5X magnification.
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