Interactively pick points and collect them in a workbook.

Mouse over the plot you want to pick point. A tooltip will show about the plot's X,Y info. Right click and click Pick  Data Points...

Click a point in graph and make sure it's the point you want to pick. Then press Enter or double click to confirm the selection. Continue it till done. A workbook will be created with x,y coordinates and row indexing, etc.