How to find the actual distance between points on a stage?

[[Ma...]]

Hello, I recently started using Correlate and I tried to follow one of the training videos. So I can now calculate the displacement (ΔL) between two curves during a test, but I cannot see an option to check the actual L0 distance between them, and I require it to calculate the strain (ΔL/L0). How do I do it? Also how do I get this value exported with the diagram that I produce?

[[Ma...]]

Also, the testing machine I used should have given GOM Aramis the load data in kN. How do I find it in order to have everything exported?