Export values in plot(s)

To write the values of the curves to a text-file, use File->Export Data.... In this dialog, you may select different options, they should be set as shown below:

If you only want to export the data in one of the plots, make sure that  is not checked and before exporting, click in the window where the curves you want to export belong to make it active.

To copy the values of the curves in the plot(s) to the clipboard, use Edit->Copy Data.