3. yes 
4. Zoom is not bad but not good enough for reading. I enjoy zoom only occasional use. 
5. yes. But I think we should optimize images before reading by converter.  
6. I just make cbz filles optimize before reading. Size and ration of image files are important.
		 
		
	
		
		
		
		
		
		
		
		
		
		
	
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