Setting a tie point
                                        1. Make sure that the Background objects window is open and the Use tie points option is selected for the background to which you want to add a tie point (Editing a background).
2.  Click the 
 icon.
The Tie point window opens.
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                                                         Note: Tie points have to lie within the background graphics.  | 
                                                
3. Click the desired position within the background graphics.
The tie point coordinates are displayed in the Tie point window.
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                                                         Note: You can specify the position as often as necessary by clicking in the background graphics until you can accept the coordinates.  | 
                                                
4. Confirm the tie point coordinates with OK.

