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1. Set the area in which objects will be detected by moving the nodes . By default, the entire frame is the detection area.
2. Set the virtual line:
   
   1. Specify the end points of the line :
      
      

      Action	Result
      Hover the cursor over the end point and, holding down the left mouse button, move the mouse	Moving the end point of a line
      Hover the cursor over the line and, holding down the left mouse button, move the mouse	Moving the line

   2. By default, both directions of object movement through the line are detected. To stop the detection in the required direction, click the button corresponding to this direction.
      

      Note
      title Attention!
      You must select at least one direction for detection. An unmonitored direction of object movement is indicated by a dimmed arrow.

      Info
      title Note
      The end points are connected by a two-color dashed line. The directions of object movement through the line are indicated by dotted arrows. For convenience of configuration, you can "freeze" the frame. Click the  button. To cancel the action, click this button again. To hide the virtual line and detection area, click the the Image Modified button. To cancel the action, click this button again.

3. Click Apply .

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