GGU-SLUGTEST: "Graphically" menu item
You can comfortably edit the imported data graphically on the screen. This saves a lot of time and tedious typing or correcting of numbers. You can also view the changes in the graph immediately on the screen. First, select the required action:

"Move measured data"
Move the required data point by drag and drop using the left mouse button. The last move can be undone by pressing the [Backspace] key."Define/delete data"
Define a new point by clicking the left mouse button at the desired position.
An existing point is deleted by clicking it with the right mouse button. The last delete can be undone by simultaneously pressing the [Backspace] and [Alt] keys.