How do I adjust the image focus?

Click Tune to automatically select the best settings for your reading. This initiates the Optimize Focus feature if available, besides the Optimize Brightness and Train Code features.

Click Optimize Focus to set the best possible focus. This feature is only available for readers with a liquid lens. For further settings, click the link next to the Optimize Focus button. Alternatively, use the Focus slider under the image by dragging, or type in a value for the focus: the value can be given either in diopter or distance (millimeters). You can also use the '+' and '-' buttons to change values, but be aware that '+' decreases diopter value, and '-' increases it. Distance is not applicable for the orange region (above 500 millimeters) of the slider, so Setup Tool automatically deactivates distance when you move the slider to that region. Moving the slider or value out of the orange region reactivates distance. For further settings, click the Advanced Focus Settings link to navigate you to the Focus Settings pane

You can also change Focus Value settings while experimenting with Live Display.

Please note that the focus distance is measured from the lens, not from the front cover of the reader.