Eschenbach Optik iFlex - Manual (Page 24)

iFlex User Manual Rev 1.0 English
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screen. You can use this line to underline the
line of text you are reading by moving the table
appropriately.
The second press of the function button will
display the shutters. These dim the text at the
top and bottom of the screen leaving an area in
the center at full brightness. The distance
between these shutters can be adjusted, as can
the position of the center area on the screen. To
adjust the shutters, use + [Function button]
(i.e. press and hold the focus button and press
the particular function button assigned as “Line |
Blank”). The unit will beep to indicate that you
are entering the shutter adjustment mode. You
can use the Zoom button to widen or reduce the
undimmed area. You can also use the brightness
button to adjust where on the screen you want
the undimmed area to appear. Pressing the
function key will exit the adjustment mode. If
you do not press a key for five seconds the iFlex
will automatically exit the adjustment mode
anyway.
Ideally, you should set your desired
magnification level then set the distance
between the shutters to suit the size of text on
the screen.