User's Manual
Page 11
To quickly reach a section of the document, move the
locator, the rectangle at the bottom center of the screen, by
slowly moving your finger on the touchpad without lifting it
(pan gesture):
Click on the touchpad (press down on the lower section of
the touchpad until you hear a clicking sound) or press the
Zoom Up button to enlarge the section delimited by the
locator.
Pan to reach other parts of the enlarged image.
Press the Zoom Up button to zoom in and the Zoom Down
button to zoom out. You can also press and hold the Zoom
Up-Down buttons to progressively adjust the zoom level, and
release once you reach your desired zoom level.
To toggle between color, positive, and negative contrasts,
press the Settings button to access the Settings menu,
scroll down by panning upward on the touchpad to select
Contrast, and press the Zoom Up-Down buttons or click on
the touchpad to toggle between the different values. Press