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To save the parameters of the detection tool, click the Apply  button. To cancel the changes, click the Cancel  button.

The Line crossing VI detector is configured.

Configuring virtual line

By default, the detector is configured to generate events when an object crosses a virtual line in any direction. To configure a virtual line, do the following:

1. In the preview window:
   
   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.

2. If necessary, you can add additional virtual lines at any location in the preview window.
   

   Info
   title Note
   Additional virtual lines are created single-directional by default. To enable the second direction, click the button next to the corresponding direction line. 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, click the Image Removed Image Added button. To cancel the action, click this button again. To delete a virtual line, click the button.

3. Click Apply .

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