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			Thank you for this option; I have thought about it, but the problem is I'm stuck to Delphi for the user interface. 
 
You don't know a way to make the remainder of the 'main' viewport invisible, i.e.: in fact you just see the two separate viewports? 
 
There will be a solution with Delphi combined with CoolForm, but that proved to be too buggy to use in a real application. 
 
Thanks for thinking about the problem!
		 
		
		
		
		
		
		
		
		
	
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