How to show part of a curve

Introduction

You can select a part of a curve in order to examine details more closely.

You can

use the zoom to magnify

cut the axes.

It is also possible fix the axes, see How to change and fix the axes.

How to use the zoom function

In the active chromatogram window, you can zoom in on a designated area of the chromatogram. This is the easiest and quickest way to enlarge different parts of a curve. The table below describes how to do this:

Step	Action
1	Open a result file.
2	Place the mouse pointer in any corner of the area you want to magnify. Press and hold the left mouse button. A magnifying glass icon will be added to the mouse pointer arrow on the screen. Drag a box to cover the area to be magnified, and release the mouse button. Result: The selected region is now displayed in the entire chromatogram window, together with appropriate scales for the Y and X axes.
3	Use the arrow keys on the keyboard to move around in the chromatogram at the current zoom scale.
4	Undo zoom Right-click in the window and select Undo zoom to undo the last zoom step. Reset zoom Right-click in the window and select Reset zoom to reset all zoom steps at once.

How to cut a curve and store as a new curve

The table below describes how to cut the curve between two values on the X-axis and store this part of the curve as a new curve:

Step	Action
1	Open a result file.
2	Choose Operations:Cut curve. Result: The Select Curve(s) to Operate On dialog box opens.
3	Select the curves to be operated on. Click OK. Result: The selected curves are shown in the Cut dialog box which contains two vertical cursor lines.
4	To select the region to be cut, either drag the two cursor lines to define the left and right limits of the cut area or type the desired left and right limit values in the Left limit and Right limit boxes. Note: The areas outside of the Left limit and Right limit will not be saved in the newly created cut curve. Thus, the X-axis of the new curve will not begin at zero unless this is designated as one of the limits. The original curve is not changed.
5	Click OK. Result: The Save Cut Curves dialog box opens.
6	Select whether to save the new cut curve in the Source chromatogram, that is the current active chromatogram, or a New chromatogram (if you select this option, you can change the name of the chromatogram. Note that it is a recommendation not to use only numbers as names for chromatograms.). Click OK. Result: If the destination of the cut curve was the source chromatogram, the cut curve is automatically displayed in the source chromatogram. If the destination of the cut curve was a new chromatogram, this will be represented as a new, open chromatogram window.

2005-06-15