INSTALLATION
1) Download and save the OPK file.
2) Drag and drop it onto the Origin workspace to install it. Then a new toolbar with two buttons will be added.
OPERATION
1)Active the 2D graph with cartesian coordinate system, and press the first button on this tool, then a line object will be added to the graph.
2)Resize and reposition the line to measure the distance between the end points of the line. At the same time, the Data Display window will show the dX, dY and the distance value of the two points.
3)To remove this line object from the graph, you can click on the "X" button (second button).