the text button again, foreground colour and background colour will be
reversed. Press this button a few times to see the difference, also switch
between text mode and picture mode to see the difference.
In text mode, letters are much clearer and brighter with higher contrast
whereas in picture mode you see all colours and shades of grey.
You do not like the colours shown in text mode? No problem! Let us change
them. You have a selection of seven false colour combinations and with
reversing foreground and background you will have 14 different colour
options. Try out by pressing the false colour button. This is the rightmost
button on the control panel. Each time you press it, the colours will change.
After you went through all 7 options it will start over again. If you want to
reverse foreground and background, press the text button.
The available false colours are black-white, black-yellow, black-cyan, black-
green, black-magenta, blue-white and blue-yellow.
Select the colours you prefer with the false colour button and press the text
button for reversing foreground and background until you find the option
you prefer.
In picture mode, the false colour button has a different function. There you
may change the white balance. Press this button to toggle between a warm
reddish white, especially for viewing photos, a neutral white or a cold bluish
white that is good for reading coloured texts.
NB: VisioBook remembers the colour settings you made. So if you switch
between text mode and picture mode and come back to text mode, you find
the previous colours there. VisioBook will even remember your last settings
when you switch it off.
Now that you found your preferred colour settings in text mode, let us try to
read some more problematic text with low contrast or faint print. In most
cases, VisioBook’s automatic image control will present a good quality
magnified image of your document. This is easy with black characters on
bright white paper. However sometimes documents are of low quality like
coloured text on coloured background or bad copies with faint print on grey
paper. In those cases we make use of the Image Optimiser button. This is the
third button from the left, directly left to the zoom knob. The image optimiser
button selects one of five levels of optimisation. So if you do not get a good
quality representation on VisioBook’s display, simply press this button several
times until you get the best result.
This button works in picture mode as well as in text mode.
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