17.1.3 Reading lines
By tapping this icon you can generate a horizontal or
vertical reading line on the screen.
17.2 Display modes and battery
Use 1 finger to touch the top section of the screen for 2 seconds
to generate the battery and display mode menu in the top half
of the screen.
17.2.1 Battery icon
This icon indicates the remaining battery life. There are 5
different icons to indicate this.
battery empty
When the battery is charging, the menu will display
the charging icon.
battery full
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