- You can select and deselect the analyzed surfaces, while 
					applying the analysis. The reflect lines will appear or disappear 
					respectively.
 
					- When you select the geometrical set as an input in the  
					 tree, all the elements included in this geometrical set are 
					automatically selected too. 
 
					- When you Click User-defined  
					Eye
					
 ,  
					a dot is displayed (you need to zoom out to locate it) defining 
					the eye and its position. 
					The reflect lines are frozen according to that direction, meaning 
					that you can move the geometry around while keeping the reflect 
					lines static according to that viewpoint. 
					You can move the eye using handles, or using the 
					Edit context menu to precisely define its location. 
					- You can drop reflect lines onto the analyzed element. To 
					do this, simply choose the  Keep this reflection line or 
					Keep all reflection lines from the context menu displayed 
					when right-clicking either a reflection line itself or one of 
					the grid neons. 
					A curve corresponding to the reflection line is created.
 
					- A Reflect Lines Analysis is created in the  
					 tree. You can therefore create several such analyses on different 
					set of surfaces or on the same set of surfaces but using a different 
					viewpoint.
 
					- As reflect line analyses are objects, as such they can be 
					edited using the context menu in the tree. 
					You can transfer a reflect line analysis from one element to 
					another, for example. To do this:
					
						- Double-click the reflect line analysis from the  
						 tree.
 
						- Select the surface on which you wish to apply the analysis. 
						Reflect lines are displayed on that surface provided the 
						grid orientation is adequate.
 
						- Select the surface on which the analysis existed, to 
						remove it.
 
						- 
						Click OK in the Reflection 
						dialog box.
 
					 
					 
				 
		
		 
		
		
	
 
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