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13.1 Adjusting the size of the LED digits

There are two parameters that can be used to alter the size of the LED digits. These two parameters are given in the constructor which has the signature DigitalLED74::DigitalLED74($aRadius=2,$aMargin=0.6) as can be seen from the above signature the default size is 2 pixels in size and a fraction of 0.6 as the distance.
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