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					Originally Posted by hawhill  The muPDF and the djvulibre engines already have such a feature, it is needed to implement highlighting (eventually, commenting etc.). So expect it to be present at some point. | 
	
 As the rough alternative for crengine-based docs, i can try to implement autoscrolling feature with the refresh time estimated, as the first approximation, from the font size.
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					Originally Posted by hawhill  Do you have experiences on how the TTS engine interfaces with the framework? | 
	
 Not at all. But I've used standard os-function 
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		| function say(text) os.execute("say " .. "\"" .. text .. "\"")
 end
 | 
	
 to replace, for example, yours 
showInfoMsgWithDelay(any_text,delay_ms,1) by 
say(any_text). And it works properly. Well, i know, i know... it's not enough to run the reading process, one has also to control the time point when it disappears from the running processes and, then, to feed the next text portion (and probably to display next page).