How to assign points on "screens" and track the data in a graph / export into excel

Hi guys,

I am new to cimplicity. I am getting my PLC to talk to my computer via an OPC server and now I am trying to extract the data from the OPC server to cimplicity and display it on the "screen" that I made. How I assign specific points to the graphics that I made and how do I track the changes in a graph / export the data in to an excel spreadsheet? Thanks a lot.