In order to copy the toning of the reference image it is enough to drag it to the area of the curves (1). Or open the sample through the menu: File > Import curves from file (do not forget to keep an eye on the condition of the buttons [Method] and [Inverted import]). The dragging of the image to the area of curves is equal to the uploading of the image and the button sequence: [De-grate] and [Transpose].