Freedom Scientific RUBY User Manual page 10

Holding RUBY with Handle Extended
Unfold and extend the handle, holding it like a magnifying glass. Move RUBY
closer to an item to view a smaller area, or farther away to view a larger area.

From the starting magnification, press the yellow button
increase magnification.

Press again to increase to the next magnification level.

Press a third time to return to the first magnification level.
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