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	You can change the view direction either from toolbar or context menu.  You  
	may look from top , right , front etc. And you can pan , rotate or zoom to an 
	area by dragging mouse on the graphic screen after giving the command 
	from toolbar .
	
	You can zoom in-out to the cursor location by rolling the mouse wheels.
	You may rotate the view dynamically by dragging on the screen while mid 
	mouse button is down.  
	
	If you activate pan the view state by pressing  related toolbar button , you 
	may pan by dragging  while left mouse button is down.
	
	You can also zoom to a box by dragging with left mouse button down after 
	related toolbar is clicked.
	
	Click here and here for more information about basic viewing functionalities