1

• Make sure that a chromatogram with the relevant curves is open in the Evaluation module.

• Choose Operations:Multiply.

Result: The Multiply dialog box is displayed.

2

• Select the curve to be multiplied in the Source chromatogram list.

• Select a curve position in the Target chromatogram list.

• Type a new Curve name or accept the default.

• Select the Multiply amplitude check box.

• Type the multiply value -1.

• Click OK.

Result: The mirror image of the original curve is displayed in the active chromatogram window.

3

Shift the mirror image curve downwards

Shift the mirror image curve downwards for an improved presentation:

• Choose Operations:Shift.

  Result: The Shift dialog box is displayed.

• Select the curve to be shifted in the Source chromatogram list.

• Select the same curve number in the Target chromatogram list box as in step 2.

• Select the Shift amplitude check box since the shift is to be made along the Y-axis.

• Type a shift value.

• Click OK.

The illustration below shows the original curve and the mirror image displayed.

4

If you want to display other curves in the active chromatogram window,

• choose Edit:Chromatogram Layout to open the Chromatogram Layout dialog box

• select the curves that you want to display

• click OK.