Actually it depends on the size of small/medium/large plus the ambient light. You might the first part of the preceding sentence is facetious, but remember with BD for .lrf and/or MSword for .rtf we can make our own sizes. On .lrx or .pdf books we may be stuck with whatever size we purchased.
On my own sized books using BD, I will read with small in good light & bump up the size as the light becomes worse.
|